City

A city is a human settlement of, theoretically, a substantial size. However, much like the precise definition of ‘intelligence’ or ‘a good decision,’ the term “city” carries a perplexing array of meanings across the globe. What one region designates as a bustling metropolis, another might deem a quaint village, or perhaps a minor inconvenience on the way to somewhere actually significant. There is, predictably, no universally agreed-upon lower boundary for what qualifies as a city, leaving the concept as fluid as human ambition itself. [1] [2]

In a more pragmatic, if somewhat uninspired, sense, a city can be narrowly defined as a permanent and densely populated expanse with clearly demarcated administrative boundaries. Its inhabitants, a curious collection of individuals, largely dedicate their efforts to pursuits other than the agricultural tasks that sustain them—a rather elegant way of saying they don’t grow their own food. [3] These concentrated human endeavors necessitate and manifest in elaborate, often sprawling, systems. Think of the intricate webs woven for housing , the ceaseless flow of transportation networks, the ever-present, though frequently overtaxed, provisions for sanitation , the complex delivery of utilities , the contentious allocation of land use , the relentless production of goods , and the incessant chatter of communication . The sheer density of these places, a characteristic both blessing and curse, undeniably facilitates a heightened degree of interaction between people, the myriad layers of government organizations that attempt to manage them, and the relentless machinery of businesses . This forced proximity, in a rare display of efficiency, sometimes manages to benefit different parties, ostensibly improving the distribution of goods and services. A small mercy, perhaps.

Historically, the majority of humanity, in its infinite wisdom, preferred the relative quiet of scattered existence. City dwellers constituted merely a small fraction of the overall world population . Yet, in a blink of cosmic time—a mere two centuries—an unprecedented and frankly alarming acceleration of urbanization has occurred. Now, over half of all humans reside within these concrete canyons, a shift that has unleashed profound and often troubling consequences for the delicate balance of global sustainability . [4] [5]

Modern cities, in their insatiable expansion, rarely exist in isolation. They typically form the dense, pulsating core of far larger metropolitan areas and sprawling urban areas . This gravitational pull creates an endless tide of commuters who, with a mixture of resignation and purpose, journey daily towards these city centres in pursuit of employment, fleeting entertainment, and the ever-elusive promise of education. Furthermore, in this era of intensifying globalization , few cities remain truly isolated. To varying degrees, they are inextricably linked on a global scale, transcending their immediate regional boundaries. This amplified influence means that cities now cast long shadows over critical global issues , including the elusive quest for sustainable development , the increasingly urgent specter of climate change , and the pervasive challenges to global health . Recognizing this undeniable, and perhaps self-inflicted, centrality, the international community has, with characteristic optimism, prioritized investment in what it terms “sustainable cities ,” enshrined within the lofty aspirations of Sustainable Development Goal 11 .

There is, of course, a rather convenient argument to be made here: the concentrated nature of dense cities, with their purportedly efficient transportation systems and reduced land consumption compared to sprawling rural areas, theoretically holds the potential for a smaller ecological footprint per inhabitant. [6] Hence, the rather fashionable notion of compact cities being touted as a crucial weapon in the fight against climate change . [7] One might almost believe humans are capable of foresight. However, this very concentration, this relentless stacking of lives and ambitions, also breeds significant harmful effects. These include the insidious formation of urban heat islands , the noxious aggregation of pollution into suffocating clouds, and the relentless strain placed upon precious water supplies and other finite resources. It seems for every perceived solution, humanity invents a fresh set of problems.

Meaning

Urban settlements

The concept of an urban area, whether it be a city or a mere town, is typically delineated by population thresholds, which, again, vary wildly depending on who you ask and where you are. These common population definitions can range from a modest 1,500 souls to a more substantial 50,000. In the U.S. , for example, most states settle on a minimum somewhere between 1,500 and 5,000 inhabitants—a rather generous baseline, one might observe. [8] [9] Intriguingly, some jurisdictions, perhaps wisely, choose to set no such arbitrary criteria, allowing the organic chaos of human congregation to speak for itself. [10]

National censuses , in their tireless efforts to quantify and categorize, employ a veritable smorgasbord of definitions for what constitutes an “urban” population. These definitions invoke a complex interplay of factors, including the raw population count, the often-telling metric of population density , the sheer number of dwellings crammed into an area, the dominant economic function of the settlement (usually non-agricultural, as previously noted), and the extent and complexity of its infrastructure . It’s an attempt to impose order on what is, at its heart, a rather messy human phenomenon. [11]

City

Palitana in Gujarat, India, stands as a testament to the enduring human need for places of religious significance, even when those places become bustling urban centers. [12]

A city, in its essence, can be distinguished from its lesser human settlement brethren not solely by its relatively impressive size—though that certainly helps—but also by the intricate web of functions it performs and, perhaps most importantly, by the peculiar special symbolic status that society, or some central authority, bestows upon it. This status, once conferred, often seems to take on a life of its own. The term itself can be employed with a certain casual indifference, referring either to the tangible collection of physical streets and buildings, the stone and steel manifestation of human ambition, or to the more ethereal assembly of people who choose to dwell within its confines. In a broader sense, it serves as a convenient shorthand to denote urban territory, sharply contrasted with the tranquil, and often overlooked, rural territory . [13] [14]

According to the more analytical “functional definition,” a city transcends mere size. Its true distinction lies in the pivotal role it assumes within a broader political and geographical tapestry. Cities, by this measure, are not just large; they are the throbbing administrative, commercial, religious, and cultural hubs for their sprawling surrounding areas. [15] [16] The presence of a literate elite, a class often with too much time and too many thoughts, is frequently observed in conjunction with cities, a natural consequence of the cultural diversities that inevitably coalesce in such concentrated environments. [17] [18] A truly typical city, if such a thing exists, is often characterized by a cadre of professional administrators , a labyrinth of regulations designed to govern every conceivable aspect of civic life, and some form of taxation —whether in the form of food, other necessities, or the means to acquire them—all to support the ever-growing ranks of government workers . This complex, hierarchical arrangement stands in stark contrast to the more typically horizontal relationships found in a tribe or a village , where common goals are often achieved through informal, often inefficient, agreements between neighbors, or through the more direct, if sometimes arbitrary, leadership of a chief. The societies that choose, or are forced, to congregate within cities are often grandly, and perhaps self-importantly, referred to as civilizations .

Population size, density

In the relentless pursuit of quantifiable metrics, the “degree of urbanization” has emerged as a modern standard to help definitively categorize what precisely constitutes a city. This metric defines a city as “a population of at least 50,000 inhabitants residing in contiguous dense grid cells (>1,500 inhabitants per square kilometer).” [19] This rather specific benchmark, forged over years of deliberation by the European Commission , OECD , World Bank , and various other esteemed bodies, was formally endorsed by the United Nations in March [2021]. Its primary purpose, of course, is the noble, if somewhat dry, endeavor of international statistical comparison. [20] For those who prefer rounder numbers, typical working definitions for what constitutes a “small-city” population generally begin around the 100,000-person mark. [11]

In specific countries

The idiosyncrasies of national identity extend even to the definition of a city. In Australia , for instance, the criteria for what officially qualifies as a city can, rather inconveniently, vary significantly between its constituent states. citation needed A testament, perhaps, to the inherent human resistance to standardization.

The United Kingdom offers an even more peculiar example, where city status is not a matter of population statistics or urban sprawl, but a regal pronouncement, awarded by the Crown. Once bestowed, this status remains permanent, with only two minor deviations from this rule due to policy shifts—a rare concession to change. This charmingly anachronistic approach means that some truly diminutive settlements can proudly bear the title of “city.” A prime example is St Davids , which, as of 2021 [update], boasts a population of a mere 1,751 souls. One might wonder if they ever feel self-conscious.

Etymology

The word ‘city’ itself, much like the urban centers it describes, has a lineage stretching back through the ages. It originates from the Old French language term: cité, which in turn descends from the Latin language : civitas. This Latin root held a dual meaning, encompassing both “citizenship” and “state”—a clear indication that from its very inception, the concept of a city was intertwined with notions of collective identity and political organization. [21] [22] The closely related, and perhaps even more conceptually weighty, term “civilization ” also springs from this same Latin root, civitas. It initially signified ‘citizenship’ or ‘community member,’ eventually evolving to correspond with urbs, which denoted ‘city’ in a more tangible, physical sense, referring to the built environment itself. [13] The Roman civitas bore a striking resemblance to the Greek polis , another foundational concept that continues to echo in English words like “metropolis "—a testament to the enduring influence of these ancient urban ideals. [23]

For those with a penchant for linguistic precision, in toponymic terminology, the specific names given to individual cities and towns are known as astionyms. This term, derived from the Ancient Greek language ἄστυ (‘city or town’) and ὄνομα (’name’), provides a scholarly label for the labels we affix to these human agglomerations. [24]

Geography

Urban geography , a rather specialized field, concerns itself with the dual challenge of understanding cities both within their broader environmental and societal contexts, and in terms of their intricate internal structures. [25] Current estimations suggest that these concentrated zones of human activity, despite their profound impact, cover a surprisingly modest 3% of the Earth’s total land surface. [26] A small footprint, perhaps, for such monumental ambition.

Site

Downtown Pittsburgh , nestled at the confluence of the Monongahela and Allegheny rivers before they merge to form the Ohio River , serves as a prime example of strategic urban placement.

The selection of a town’s site, a decision often imbued with far-reaching consequences, has historically been a dynamic process, adapting and evolving with shifts in natural landscapes, technological advancements, economic imperatives, and the ever-present demands of military strategy. Access to a reliable water source, whether a river or a coastline, has for millennia remained a paramount factor in the initial placement and subsequent expansion of cities. While the advent of rail transport in the nineteenth century offered a degree of liberation from this hydrological dependency, the vast majority of the world’s urban population continues, through the present day, to cluster near coasts or along the life-giving arteries of rivers. [27]

Urban areas, by their very nature, are generally incapable of producing their own food . This inherent limitation necessitates the development of a complex and often exploitative relationship with a surrounding hinterland , a rural periphery that exists primarily to sustain the urban core. [28] It’s a fundamental codependency. Only in highly specialized and somewhat anomalous cases, such as the transient existence of mining towns that play a critical, if temporary, role in long-distance trade, do cities manage to exist in a state of relative disconnection from the countryside that feeds them. [29] Thus, the strategic centrality within a productive agricultural region exerts a powerful influence on urban siting. Economic forces, in their relentless pursuit of efficiency, would naturally favor the establishment of marketplaces in locations that are optimally accessible to all, facilitating the exchange of goods and the concentration of wealth. [30]

Center

Main article: City centre

Kluuvi , a vibrant city centre in Helsinki , Finland, exemplifies the concentrated heartbeat of an urban area.

The vast majority of cities, whether ancient or modern, possess a discernible central area. This core typically houses buildings of exceptional economic, political, and religious significance, drawing the eye and the footsteps of all who enter. Archaeologists, with their fondness for ancient terms, often refer to this sacred or monumental space as a temenos , or, if it was fortified against the inevitable threats of history, as a formidable citadel . [31] These central spaces, throughout human history, have served not merely as functional areas but as powerful symbolic reflections, amplifying the city’s inherent centrality and its overarching importance to its wider sphere of influence . [30] Today, the modern iteration of this ancient concept is known simply as the city center or downtown , often, though not always, coinciding with the bustling hub of a central business district . It is here that the city’s pulse beats most fiercely, and its ambitions are most overtly displayed.

Public space

Trafalgar Square , a renowned public meeting place in central London , stands as a testament to the enduring human need for shared civic spaces.

Cities, in their most fundamental design, typically incorporate public spaces —areas where any individual, regardless of status, can, theoretically, go. These range from privately owned spaces that are nonetheless open to the public (a rather clever concession by capital) to more traditional forms of public land such as the public domain and the ancient concept of the commons . Western philosophy , tracing its lineage back to the Greek agora , has long posited that physical public space forms the essential substrate for the symbolic public sphere —the arena where ideas are exchanged and collective identity is forged. [32] [33] Often, these public spaces are “adorned” (or, depending on one’s aesthetic sensibilities, “disfigured”) by various forms of public art . Parks and other thoughtfully integrated natural sites within cities serve as crucial oases, offering residents a much-needed respite from the relentless hardness and monotonous regularity of the typical built environments . These urban green spaces are not merely aesthetic amenities; they constitute a vital component of public space that provides tangible benefits, particularly in mitigating the oppressive urban heat island effect, especially in cities situated in warmer climates. Beyond comfort, these green zones actively work to prevent carbon imbalances, stem extreme habitat losses, reduce excessive electricity and water consumption, and even alleviate human health risks. [34] A surprisingly practical application of nature, for all its inherent wildness.

Internal structure

The L’Enfant Plan for Washington, D.C. masterfully combines a utilitarian grid pattern with grand diagonal avenues, all while maintaining a symbolic focus on monumental architecture—a classic example of intentional urban design.

The urban structure of a city rarely arises purely by chance. It generally adheres to one or more fundamental patterns: the organic flow of geomorphic adaptation, the radiating spokes of a radial design, the layered rings of a concentric model, the strict lines of a rectilinear grid, or the more graceful curves of a curvilinear layout. The inherent physical environment, with its mountains, rivers, and plains, invariably imposes constraints on the form a city can take. If a settlement clings to a mountainside, its urban structures will naturally conform to terraces and winding roads. It might adapt its layout to its primary means of subsistence, whether that be the geometric precision of agriculture or the organic sprawl of a fishing community. And, of course, for millennia, cities were meticulously arranged for optimal defense, leveraging the surrounding landscape to their advantage. [35] Beyond these “geomorphic” dictates, cities further develop intricate internal patterns, a result either of unbridled natural growth or the deliberate, often heavy-handed, hand of city planning .

In a radial structure, the main thoroughfares converge dramatically upon a central point, much like the spokes of a wheel. This form often evolves over extended periods of successive growth, with the concentric traces of ancient town walls and formidable citadels serving as ghostly markers of older city boundaries. In more recent history, these organic radial patterns have been supplemented by the strategic addition of ring roads , designed to shunt traffic around the city’s periphery, a practical concession to modern congestion. Dutch cities, such as the labyrinthine Amsterdam and the historic Haarlem , offer prime examples of this structure, characterized by a central square encircled by concentric canals, each marking a new wave of urban expansion. In cities like Moscow , this distinctive pattern remains strikingly visible, a historical palimpsest etched onto the urban fabric.

Conversely, a system of rectilinear city streets and rigidly defined land plots, famously known as the grid plan , has been employed for millennia across Asia, Europe, and the Americas. The ancient Indus Valley Civilization , with a foresight that still impresses, meticulously constructed Mohenjo-Daro , Harappa , and other sophisticated cities according to a precise grid pattern. These layouts adhered to ancient principles, some described by the venerable Kautilya , and were remarkably aligned with the fundamental compass points . [36] [15] [37] [38] The ancient Greek city of Priene further exemplifies the enduring utility of the grid plan, featuring specialized districts—a precursor to modern zoning—that were systematically applied across the sprawling Hellenistic period Mediterranean. It seems even ancient humans appreciated order, or at least the illusion of it.

Urban areas

The Nile banks in Cairo showcase a vibrant urban landscape, a testament to civilization’s enduring attraction to life-giving rivers.

The modern urban-type settlement, in a phenomenon often critically labeled as urban sprawl , now extends far beyond the traditional, often quaint, boundaries of the city proper . [39] This relentless decentralization and dispersal of what were once core city functions—commercial, industrial, residential, cultural, and political—has fundamentally altered the very meaning of the term “city.” It has, to the perpetual frustration of geographers, significantly challenged the once-clear urban-rural binary, blurring lines that were perhaps never as distinct as we imagined. [9]

These expansive metropolitan areas now encompass a complex ecosystem of suburbs and even more distant exurbs , all intricately organized around the relentless needs of commuters . Occasionally, they even give rise to “edge cities,” semi-autonomous entities characterized by a surprising degree of economic and political independence. (In the United States , these sprawling formations are meticulously grouped into metropolitan statistical areas for the rather mundane purposes of demography and marketing .) Some cities, in their relentless expansion, have now merged into continuous urban landscapes, a phenomenon known variously as urban agglomeration , conurbation , or the rather daunting term “megalopolis "—exemplified perfectly by the gargantuan BosWash corridor stretching across the Northeastern United States . [41] It’s a testament to humanity’s capacity for both growth and, arguably, overcrowding.

History

Main article: History of cities Further information: Urban history , Historical urban community sizes , and List of largest cities throughout history

An arch from the ancient Sumerian city of Ur , which flourished in the third millennium BC , can still be observed at present-day Tell el-Mukayyar in Iraq , a silent testament to its enduring legacy. Mohenjo-daro , a sophisticated city of the Indus Valley Civilization in modern-day Pakistan, offers a fascinating glimpse into early urban resilience, having been meticulously rebuilt six or more times, consistently employing bricks of a standard size and adhering to the same precise grid layout—all within the third millennium BC . An aerial perspective of what was once downtown Teotihuacan reveals the awe-inspiring scale of the Pyramid of the Sun and the Pyramid of the Moon , flanking a grand processional avenue that served as the very spine of the city’s meticulously planned street system.

The emergence of true cities from earlier, less defined proto-urban settlements , such as the remarkably complex Çatalhöyük , was far from a linear, predictable progression. Instead, it represents a multifaceted and often chaotic development, showcasing the incredibly varied experiences of early urbanization across different cultures and geographies. [42] Among the contenders for the title of “longest continually inhabited cities ,” we find names that echo through millennia: Jericho , Aleppo , Byblos , Faiyum , Yerevan , Athens , Matera , Damascus , and Argos . These places have seen empires rise and fall, yet their human pulse has, against all odds, continued. [43] [44]

Cities, defined by their characteristic population density , their often-overt symbolic function, and the undeniable imprint of urban planning , have not merely existed but have thrived for thousands of years. [45] In the conventional historical narrative, the twin concepts of civilization and the city are often seen as direct consequences of the development of agriculture . This pivotal shift, it is argued, enabled the production of surplus food, which in turn facilitated a crucial social division of labor (with its often-uncomfortable companion, social stratification ) and the burgeoning of trade . [46] [47] Early cities, perhaps unsurprisingly, frequently featured prominent granaries , sometimes even integrated within the sacred confines of a temple—a clear indication of the nexus between sustenance and spiritual authority. [48]

However, a dissenting, minority viewpoint posits that cities may not have been exclusively dependent on agriculture. They could, it is suggested, have arisen through alternative means of subsistence, such as intensive fishing. [49] Other theories suggest their genesis as communal seasonal shelters, [50] or perhaps even more cynically, for their inherent value as strategic bases for both defensive and offensive military organization. [51] [52] Alternatively, their existence might be attributed to their intrinsic economic function, predating large-scale agriculture. [53] [54] [55] Regardless of their precise origins, cities quickly assumed a crucial role in the establishment and projection of political power over a given area. Ancient leaders, such as the formidable Alexander the Great , understood this implicitly, founding and creating cities with an almost zealous dedication, recognizing them as essential tools for empire-building and the consolidation of control. [56]

Ancient times

Further information: Cities of the Ancient Near East , Polis , City-state , and Late Antiquity § Cities “Ancient city” redirects here. For other uses, see Ancient city (disambiguation) .

A modern artistic rendering of Ancient Rome , a truly monumental achievement as the first city in the world to reach a population of one million inhabitants.

Jericho and Çatalhöyük , with archaeological evidence dating them back to the eighth millennium BC , are widely recognized as among the earliest proto-cities unearthed by archaeologists. [50] [57] Yet, it is the Mesopotamian city of Uruk , flourishing in the mid-fourth millennium BC in what is now ancient Iraq, that most archaeologists credit as the first true city. Uruk, during the period that now bears its name, the Uruk period , innovated and established many of the fundamental characteristics that cities would follow for millennia. [58] [59] [60]

Throughout the fourth and third millennium BC , complex and often enigmatic civilizations blossomed in the fertile river valleys of Mesopotamia , India , [61] [62] China , [63] and Egypt . Archaeological excavations in these historically rich areas have painstakingly uncovered the ruins of cities, each seemingly geared towards a specific primary function: some were bustling centers of trade, others seats of political power, and still others dedicated to religious devotion. While some of these ancient urban centers boasted remarkably large and dense populations , others, perhaps more subtly, exerted their urban influence primarily through their political or religious activities, even without housing an enormous populace.

Among these early Old World cities, Mohenjo-daro of the Indus Valley Civilization , located in present-day Pakistan and thriving from approximately 2600 BC, stands out as one of the largest. It is estimated to have housed a population of 50,000 or more, supported by a remarkably sophisticated sanitation system that puts many later civilizations to shame. [64] China’s planned cities , a testament to a different kind of order, were meticulously constructed according to sacred principles, designed to function as celestial microcosms —a rather ambitious undertaking. [65]

The Ancient Egyptian cities that have been physically identified and studied by archaeologists are, perhaps surprisingly, not as extensive as one might imagine, given their monumental architectural achievements elsewhere. [15] Notable examples, known by their Arab names, include El Lahun , a workers’ town meticulously associated with the pyramid of Senusret II , and the short-lived religious city of Amarna , famously built by the heretic pharaoh Akhenaten and subsequently abandoned. These sites reveal a highly regimented and stratified planning, with a minimalist grid of rooms allocated for the laboring classes, while increasingly elaborate housing was reserved for the higher echelons of society. [66]

In the fertile crescent of Mesopotamia , the foundational civilization of Sumer , followed by the empires of Assyria and Babylon , gave rise to a multitude of cities. These urban centers, governed by powerful kings, were crucibles of innovation, fostering multiple languages meticulously recorded in cuneiform script. [67] The Phoenician trading empire, a maritime power that flourished around the turn of the first millennium BC , established an extensive network of cities stretching from the eastern Mediterranean hubs of Tyre , Cydon , and Byblos all the way to the western outposts of Carthage and Cádiz —a truly impressive logistical feat.

In the ensuing centuries, the independent city-states of Greece , particularly the intellectual powerhouse of Athens , developed the concept of the polis . This was not merely a physical city, but a profound association of male landowning citizens who collectively constituted the city’s political and social body. [68] The agora , a term meaning “gathering place” or “assembly,” served as the vibrant heart of the polis, where athletic contests, artistic performances, spiritual rituals, and, crucially, political life converged. [69] Rome , in its imperial ascendancy, achieved the unprecedented feat of becoming the first city in the world to surpass one million inhabitants. Under the expansive authority of its empire , Rome not only transformed existing urban centers but also extensively founded numerous new cities (known as Colonia ), disseminating its distinctive principles of urban architecture, design, and societal organization across a vast dominion. [70]

Across the ancient Americas , distinct early urban traditions independently blossomed in both the Andes and Mesoamerica . In the rugged Andean region, the earliest urban centers emerged within the Norte Chico civilization , followed by the Chavin and Moche cultures. This trajectory culminated in the development of major cities under the later Huari , Chimu , and Inca cultures. The Norte Chico civilization, notably, encompassed as many as 30 significant population centers in what is now the Norte Chico region of north-central coastal Peru , establishing itself as the oldest known civilization in the Americas, flourishing between the 30th and 18th centuries BC. [71] Mesoamerica, meanwhile, witnessed the rise of early urbanism across several distinct cultural regions, beginning with the enigmatic Olmec , then spreading to the Preclassic Maya , the Zapotec of Oaxaca, and the monumental Teotihuacan in central Mexico. Later cultures, including the Aztec , various Andean civilizations , the Mayan , the Mississippians , and the Pueblo peoples, all drew upon these rich earlier urban traditions. Remarkably, many of these ancient cities continue to be inhabited today, including major metropolitan centers like Mexico City , which stands directly upon the foundations of the ancient Tenochtitlan . Similarly, ancient, continuously inhabited Pueblos are found in close proximity to modern urban areas in New Mexico , such as Acoma Pueblo near the Albuquerque metropolitan area and Taos Pueblo near Taos, New Mexico . Other significant cities, like Lima , are situated near ancient Peruvian sites such as Pachacamac , demonstrating a continuity of human settlement over millennia.

From approximately 1600 BC, Dhar Tichitt , located in the southern reaches of present-day Mauritania , began to exhibit characteristics that strongly suggested an incipient form of urbanism, a fascinating early example from West Africa . [72] [73] The second region in West Africa to display clear urban characteristics was Dia, Mali , in what is now modern Mali , emerging around 800 BC. [72] [73] Both Dhar Tichitt and Dia, intriguingly, were founded by the same people: the Soninke people , who would later go on to establish the powerful Ghana Empire . [73]

Another ancient site, Jenné-Jeno , also in present-day Mali , has been dated to the third century BCE. According to the research of Roderick and Susan McIntosh, Jenné-Jeno defied traditional Western notions of urbanity, largely because it lacked monumental architecture and a distinct elite social class. However, they argue, it should absolutely be considered a city based on a more functional redefinition of urban development. Specifically, Jenné-Jeno featured settlement mounds arranged in a horizontal, rather than a vertical, hierarchy of power, serving as a vital center of specialized production and exhibiting a clear functional interdependence with its surrounding agricultural hinterland . [74]

More recent scholarly consensus indicates that the civilization of Jenné-Jeno was likely established by the Mande peoples , who are the progenitors of the modern Bozo people . Their continuous habitation of the site spanned a remarkable period from the 3rd century BCE to the 13th century CE. [75] Archaeological evidence uncovered at Jenné-Jeno, particularly the presence of non-West African glass beads dated from the third century BCE to the fourth century CE, strongly suggests that pre-Arabic trade contacts existed between Jenné-Jeno and North Africa, hinting at a more interconnected ancient world than previously imagined. [76]

Furthermore, other significant early urban centers in West Africa , dated to approximately 500 CE, include Awdaghust , Koumbi Saleh (the ancient capital of the Ghana Empire), and Maranda, a strategic center situated on a crucial trade route connecting Egypt and Gao. [77] These cities collectively paint a picture of a vibrant and complex urban history in a region often overlooked in traditional narratives.

Middle Ages

Vyborg in Leningrad Oblast stands as a testament to medieval endurance, having existed since the 13th century. The Old City of Utrecht , Netherlands, a charming labyrinth of history. A map of the Free imperial cities of the Holy Roman Empire in 1648, illustrating their unique political autonomy within a vast empire. A meticulously rendered map of Haarlem in the Netherlands, created around 1550, vividly depicts the city entirely encircled by a formidable city wall and a protective defensive canal , its distinctly square shape reputedly inspired by the sacred geometry of Jerusalem .

The seismic dissolution of the Roman Empire in the West ushered in profound and often chaotic transformations in the urban fabric of western Europe. [78] In regions where Roman administration crumbled rapidly, urbanism faced an existential crisis, though the symbolic resonance of the city often stubbornly endured. [79] In areas like Italy or Spain, cities, though diminished in size and grandeur, tenaciously clung to their vital roles in both the economy and local governance. [80] Late antique cities in the East were simultaneously undergoing their own intense metamorphoses, characterized by increased political participation of the masses and dramatic demographic fluctuations. [81] Christian communities and their often-contentious doctrinal differences increasingly exerted their influence, shaping the very layout and social dynamics of urban spaces. [82] The locus of power, both political and cultural, shifted decisively to Constantinople and, with breathtaking speed, to the ascendant Islamic civilization , which gave rise to magnificent new urban centers such as Baghdad , Cairo , and Córdoba, Spain . [83] From the 9th century through the close of the 12th century, Constantinople , the resplendent capital of the Eastern Roman Empire , reigned as the largest and wealthiest city in Europe, its population approaching a staggering 1 million souls. [84] [85] The Ottoman Empire , in its relentless expansion, gradually asserted control over many cities across the Mediterranean basin, culminating in the historic Fall of Constantinople in 1453 .

Within the labyrinthine structure of the Holy Roman Empire , a fascinating phenomenon began to emerge in the 12th century: the free imperial cities . These privileged urban centers, including the likes of Nuremberg , Strasbourg , Frankfurt , Basel , Zürich , and Nijmegen , formed an elite tier among towns. They had either successfully wrested self-governance from their local lords or had been granted it directly by the emperor, placing them under his immediate protection. By 1480, these cities, to the extent they remained within the empire’s shifting borders, had ascended to the ranks of the Imperial Estates , wielding significant influence alongside the emperor through the formidable Imperial Diet . [86]

By the 13th and 14th centuries, some cities had transcended their municipal origins to become powerful, independent states in their own right. They either absorbed surrounding territories under their control or established vast, lucrative maritime empires. In Italy, the vibrant medieval communes evolved into formidable city-states , most famously the Republic of Venice and the Republic of Genoa , whose merchant fleets dominated the Mediterranean. In Northern Europe, cities such as Lübeck and Bruges forged the Hanseatic League , a powerful commercial and defensive alliance that reshaped trade routes and political power. Their influence, however, was later challenged and eventually eclipsed by the rising commercial might of the Dutch cities of Ghent , Ypres , and Amsterdam . [87] Similar patterns of urban autonomy and influence could be observed elsewhere, notably in the case of Sakai, Osaka , which enjoyed considerable independence in late medieval Japan.

In the first millennium AD, the Khmer Empire capital of Angkor in Cambodia achieved a truly astonishing scale, growing into the most extensive preindustrial settlement in the world by sheer area. [88] [89] Covering over 1,000 square kilometers (390 square miles), this sprawling complex of temples and residences possibly supported a population of up to one million people, a testament to sophisticated engineering and social organization. [88] [90]

West Africa had already witnessed the development of cities before the Common Era , but the consolidation and expansion of Trans-Saharan trade during the Middle Ages dramatically increased the number of urban centers in the region. This economic boom also led to the remarkable growth of some cities into highly populous hubs, including notably Gao (estimated at 72,000 inhabitants in 800 AD), Oyo-Ile (50,000 inhabitants in 1400 AD, potentially reaching 140,000 in the 18th century), Ile-Ifẹ̀ (70,000 to 105,000 inhabitants in the 14th and 15th centuries), Niani, Guinea (50,000 inhabitants in 1400 AD), and the legendary Timbuktu (100,000 inhabitants in 1450 AD). [72] [91] These cities were not just centers of trade but vibrant cultural and intellectual crossroads.

Early modern

In the West, the aftermath of the Peace of Westphalia in the seventeenth century solidified the nation-state as the preeminent unit of political organization, fundamentally reshaping the geopolitical landscape. [92] [93] Europe’s burgeoning larger capitals, such as London and Paris , reaped immense benefits from the explosion of commerce that followed the establishment of a robust Atlantic Ocean trade network. However, for all the grand narratives, the vast majority of towns across the continent remained relatively small, their growth constrained by local economies and limited connectivity.

During the expansive Spanish colonization of the Americas , the ancient Roman concept of city-building was revived and extensively applied. Cities were strategically founded in the heart of newly conquered territories, meticulously planned and governed by a comprehensive body of laws pertaining to administration, finance, and urbanism. These were not organic growths but deliberate impositions of order and control.

Industrial age

The profound growth of modern industry , commencing in the late 18th century and accelerating thereafter, triggered a period of unprecedented and often chaotic urbanization . This era witnessed the dramatic rise of entirely new great cities, initially concentrated in Europe and subsequently spreading to other regions of the world. The promise of new opportunities, often harsh and unforgiving, acted as a powerful magnet, drawing immense numbers of migrants from their rural communities into these burgeoning urban areas. England, the crucible of the Industrial Revolution, led this transformative wave. London ascended to become the capital of a vast world empire , while cities across the country swelled in size, strategically located to serve the demands of manufacturing . [94] In the United States , between 1860 and 1910, the widespread introduction of railroads drastically reduced transportation costs, catalyzing the emergence of colossal manufacturing centers and fueling a relentless tide of migration from rural farmlands to the urban factory gates.

However, this rapid industrialization and urban growth came at a steep cost. Many industrialized cities found themselves grappling with severe public health challenges. These included the pervasive issues of overcrowding , the inherent occupational hazards of industrial labor, the widespread contamination of water and air, the dire consequences of poor sanitation , and the rampant spread of communicable diseases such as typhoid and cholera . Factories , often belching smoke and grime, and sprawling slums became depressingly regular features of the urban landscape, stark symbols of the era’s relentless pursuit of progress at any human cost. [95]

Post-industrial age

In the latter half of the 20th century, a new economic paradigm emerged in the West: deindustrialization , often euphemistically termed “economic restructuring .” This shift, while necessary in some respects, led to a cascade of social ills, including widespread poverty , rampant homelessness , and profound urban decay in cities that had once been bastions of prosperity. America’s once-mighty “Steel Belt” tragically transformed into a “Rust Belt ,” and cities like Detroit, Michigan , and Gary, Indiana , began a stark process of shrinking , running counter to the prevailing global trend of massive urban expansion. [96] These cities have since attempted, with varying degrees of success, to pivot towards a service economy and engage in complex public-private partnerships . This has often resulted in concomitant gentrification , unevenly distributed revitalization efforts , and a selective focus on cultural development, often leaving many residents behind. [97] Meanwhile, under the ambitious directives of the Great Leap Forward and subsequent five-year plans of China that continue to this day, China has undergone a simultaneous and staggering process of urbanization and industrialization , ascending to become the world’s leading manufacturer —a truly monumental transformation. [98] [99]

Amidst these turbulent economic shifts, the relentless march of high technology and the instantaneous global reach of telecommunication have enabled a select few cities to re-establish themselves as indispensable centers of the burgeoning knowledge economy . [100] [101] [102] A new paradigm, the “smart city,” has emerged, championed by influential institutions such as the RAND Corporation and IBM . This vision entails the application of sophisticated computerized surveillance , advanced data analysis, and intricate e-governance systems to manage every conceivable aspect of urban life and the lives of its inhabitants. [103] Some corporations, in a display of almost dystopian ambition, are even constructing entirely new master-planned cities from scratch on pristine greenfield sites, attempting to engineer perfect urban environments from the ground up.

World Heritage listing

From the late 20th century, UNESCO , in its role as guardian of global cultural treasures, has increasingly recognized and included numerous cities of “Outstanding Universal Value” on its prestigious list. Subsequently, entire cities, or significant portions thereof, have been designated as UNESCO World Heritage Sites . These listings often encompass historic centers, unique cultural landscapes, and distinctive urban fabrics, highlighting their profound historical significance, remarkable architecture, and enduring cultural traditions for the benefit of all humanity. citation needed It’s a formal acknowledgment that some human creations, however flawed, manage to transcend the mundane.

Urbanization

Main article: Urbanization

A graph illustrating the trajectory of urbanization from 1950, with projections extending to 2050, vividly displays humanity’s relentless march towards urban living. [104] A map depicting urban areas with populations of at least one million inhabitants in 2025, highlighting the global distribution of these colossal human agglomerations.

Urbanization is not merely a demographic shift; it is a profound societal process, characterized by the mass migration of populations from rural to urban areas, propelled by a complex interplay of political, economic, and cultural forces. Until the 18th century, a precarious equilibrium largely existed between the vast rural agricultural population and the relatively smaller towns, which served as local markets and centers for small-scale manufacturing . [105] [106] However, with the advent of the British Agricultural Revolution and the subsequent transformative power of the Industrial Revolution , urban populations embarked on a period of unprecedented and explosive growth, fueled by both relentless migration and dramatic demographic expansion . In England , for example, the proportion of the population residing in cities surged from a mere 17% in 1801 to a staggering 72% by 1891. [107] By the turn of the 20th century, in 1900, only 15% of the world’s total population could be classified as urban dwellers. [108] Beyond mere economic necessity, the undeniable cultural allure of cities, with their promise of novelty and opportunity, also plays a significant role in attracting and retaining residents. [109]

This relentless wave of urbanization rapidly swept across Europe and the Americas, and since the 1950s, it has firmly taken root in Asia and Africa as well. The Population Division of the United Nations Department of Economic and Social Affairs reported in 2014 that, for the first time in human history, more than half of the world’s population now resides in cities. [110] [a]

Latin America currently holds the distinction of being the most urbanized continent, with a staggering four-fifths of its population living in cities. Within this urban landscape, a disconcerting one-fifth of the population is said to inhabit precarious shantytowns (known by various local names such as favelas in Brazil or poblaciones callampas in Chile). [117] Cities like Batam in Indonesia , Mogadishu in Somalia , Xiamen in China , and Niamey in Niger are currently experiencing some of the world’s most rapid growth, boasting annual rates of 5–8%. [118] Generally speaking, the more economically developed nations of the “Global North ” remain more urbanized than the less developed countries of the “Global South .” However, this disparity is steadily diminishing as urbanization accelerates at a significantly faster pace in the latter group. Asia, in sheer absolute numbers, is home to by far the greatest concentration of city-dwellers, with over two billion and counting. [106] The UN, with its characteristic long-term projections, anticipates an additional 2.5 billion city dwellers (and a corresponding 300 million fewer rural inhabitants) worldwide by 2050, with a staggering 90% of this urban population expansion projected to occur in Asia and Africa. [110] [119]

The phenomenon of megacities —cities boasting populations in the multi-millions—has proliferated dramatically, now numbering in the dozens. These colossal urban centers are emerging particularly rapidly in Asia, Africa, and Latin America. [120] [121] The relentless engine of economic globalization fuels the exponential growth of these cities, as new torrents of foreign financial capital facilitate rapid industrialization and the strategic relocation of major businesses from Europe and North America, inevitably attracting countless immigrants from both near and far. [122] Within these burgeoning megacities, however, a profound and often stark gulf typically separates the immensely wealthy from the desperately poor. A super-wealthy elite often resides in exclusive gated communities , while vast masses of people are relegated to substandard housing, lacking adequate infrastructure and enduring otherwise impoverished conditions. [123]

Cities across the globe have not only swelled in population but have also expanded physically. This manifests in increases in their surface extent, the dramatic ascent of high-rise buildings for both residential and commercial purposes, and even the subterranean development of underground spaces. [124] [125]

This relentless urbanization can, and often does, create an immediate and overwhelming demand for effective water resources management . Formerly pristine sources of freshwater become rapidly overused and polluted, and the sheer volume of generated sewage quickly begins to exceed manageable levels, presenting a perpetual and often intractable challenge. [126]

Government

Further information: Local government

The city council of Tehran convenes in September 2015, a snapshot of urban governance in action.

The local government of cities manifests in a diverse array of forms. Prominently among these is the municipality (a term particularly prevalent in England , in the United States , India , and other former British colonies ; legally, often a municipal corporation ). In Spain and Portugal , and indeed across most former territories of the Spanish and Portuguese empires, the term municipio is common, often alongside municipalidad . In France and Chile , the equivalent administrative unit is the commune (or comune in Italy). This linguistic and structural diversity reflects the varied historical and political trajectories of urban development worldwide.

The chief official of a city, the symbolic and often actual leader, is very frequently designated the “mayor .” Regardless of the true extent of their political authority, the mayor typically serves as the figurehead or the very personification of their city, embodying its aspirations and occasional frustrations. [128]

Due to the undeniable fact of their greater urban density , legal conflicts and intricate issues tend to arise with considerably greater frequency in cities than in more sparsely populated areas. [129] Modern city governments, in their relentless pursuit of order and functionality, thoroughly regulate nearly every dimension of everyday life . This expansive regulatory reach includes critical areas such as public health and individual health , the complex dance of transport , the solemn rituals of burial , the careful allocation of resource use and extraction , the provision of recreation , and the very nature and utilization of buildings . The technologies, techniques, and legal frameworks governing these diverse areas—many of which were initially conceived and refined within cities—have subsequently become ubiquitous, spreading their influence far beyond urban boundaries. [130]

Municipal officials, those tasked with the day-to-day administration of urban affairs, may either be appointed by a higher level of government or, in a more democratic fashion, elected directly by the local populace. [131]

Municipal services

The Dublin Fire Brigade in Dublin, Ireland, bravely battling a severe fire at a hardware store in 1970, illustrating a critical municipal service in action.

Cities, in their fundamental commitment to the well-being and functionality of their residents, typically provide a suite of essential municipal services . These include, prominently, education , delivered through comprehensive school systems ; maintaining public order through dedicated policing and police departments; and the vital, often heroic, service of firefighting , executed by organized fire departments . Beyond these, cities are responsible for the foundational elements of their basic infrastructure. These services are generally delivered with a degree of routine and, ideally, in a more or less equitable fashion to all inhabitants. [132] [133] While the primary responsibility for administration usually rests with the city government, it’s not uncommon for some services to be overseen by a higher level of government, [134] while others, in an increasingly common trend, may be privately run. [135] In times of severe domestic turmoil, such as America’s King assassination riots of 1968, the military may even be deployed to assume policing responsibilities within cities, a stark reminder of the fragility of civil order.

Finance

The traditional bedrock of municipal finance is the local property tax , levied on real estate situated within the city’s boundaries. Local governments can also generate revenue by charging for specific services or by leasing out land they own. [136] However, the perennial challenge of adequately financing municipal services, along with ambitious urban renewal and other development projects, remains a constant struggle. Cities address this through a complex ballet of appeals to higher levels of government, intricate arrangements with the private sector, and increasingly, through techniques such as privatization (divesting services to the private sector ), corporatization (forming quasi-private, municipally owned corporations), and the rather opaque process of financialization (packaging city assets into tradeable financial public contracts and other related rights). This situation has become particularly acute in deindustrialized cities and in cases where businesses and wealthier citizens have, with calculated indifference, relocated beyond city limits and, crucially, beyond the reach of local taxation. [137] [138] [139] [140]

In their relentless search for ready cash , cities increasingly resort to issuing municipal bonds , essentially a loan from the public with a promise of interest and a defined repayment date . [141] City governments have also begun to strategically employ tax increment financing (TIF), a mechanism where a development project is initially funded by loans secured against the future tax revenues it is projected to generate. [140] Under these financial pressures, creditors, and consequently city governments themselves, place immense importance on a city’s credit ratings , which serve as a public barometer of fiscal health and trustworthiness. [142]

Governance

The Ripon Building , serving as the headquarters of the Greater Chennai Corporation in Chennai, stands as one of the oldest city governing corporations in Asia , a testament to enduring civic administration.

Governance , a broader concept than mere government, encompasses the wider domain of social control functions, often implemented by a diverse array of actors, including influential non-governmental organizations . [143] The profound impact of globalization and the increasing role of powerful multinational corporations in local governments worldwide have instigated a significant shift in the prevailing perspective on urban governance. This has moved away from the traditional “urban regime theory,” which posited that a coalition of local interests functionally governed a city, towards a more contemporary theory of external economic control, a view widely associated in academic circles with the philosophy of neoliberalism . [144]

In this neoliberal model of governance, public utilities are increasingly privatized , industries are subjected to deregulation , and large corporations ascend to the status of de facto governing actors. This is evident in the considerable power they wield within public-private partnerships , their influence over business improvement districts , and the expectation of self-regulation through the often-ambiguous concept of corporate social responsibility . In this landscape, the biggest investors and real estate developers effectively function as the city’s de facto urban planners, shaping the urban environment according to market forces rather than purely public interest. [145]

The related concept of “good governance ” places a greater emphasis on the role and effectiveness of the state, primarily with the objective of assessing urban governments for their suitability for development assistance . [146] The concepts of both governance and good governance are particularly invoked in the context of emergent megacities, where international organizations frequently deem existing governmental structures inadequate to effectively manage their enormous and rapidly growing populations. [147] It’s a rather polite way of saying some cities are, frankly, a bit of a mess.

Urban planning

Main articles: Urban planning and Urban design

La Plata in Argentina, meticulously designed in the 1880s as the new capital of Buenos Aires Province , is based on a perfect square with 5196-meter sides—a striking example of premeditated urban order. [148]

Urban planning , the audacious application of forethought to the complex tapestry of city design, involves the intricate process of optimizing land use , transportation , utilities , and other fundamental systems. The ultimate goal, of course, is to achieve certain objectives —objectives that are often debated and rarely universally agreed upon. Urban planners and scholars, in their endless pursuit of the ideal city, have proposed a multitude of overlapping theories outlining how these plans should be formed. Beyond the initial grand design of the city itself, the tools of planning include strategic public capital investment in infrastructure and, crucially, various land-use controls such as the often-contentious practice of zoning . The continuous, iterative process of comprehensive planning involves not only identifying broad objectives but also meticulously collecting data to evaluate progress and inform future, hopefully better, decisions. [149] [150]

While government holds the ultimate legal authority over planning, in practice, the process is a complex dance involving both public and private elements, often with conflicting interests. The legal principle of eminent domain empowers the government to divest citizens of their private property when its use is deemed necessary for a public project—a power that, predictably, is not without controversy. [150] Planning inherently involves tradeoffs, decisions where some parties inevitably gain while others lose, thus inextricably linking it to the prevailing political situation and the distribution of power. [151]

The history of urban planning stretches back to some of the earliest known cities, particularly those of the Indus Valley and Mesoamerican civilizations, which meticulously built their urban centers on precise grids and apparently designated different areas for distinct purposes. [15] [152] The pervasive effects of planning, now ubiquitous in the modern world, are most clearly observed in the deliberate layout of planned communities , which are fully designed prior to construction, often with an ambitious consideration for interlocking physical, economic, and cultural systems. It’s an attempt to engineer human environments, sometimes for the better, often with unforeseen consequences.

Society

Social structure

Urban society , in its intricate and often unforgiving complexity, is typically characterized by pronounced social stratification . Spatially, cities are, whether formally or informally, segregated along predictable lines of ethnicity, economic status, and race. Individuals living in close physical proximity may nonetheless inhabit, work, and socialize in entirely separate areas, associating with distinct groups of people. This leads to the formation of discernible ethnic or lifestyle enclaves or, in areas of concentrated poverty, the creation of stark ghettoes . While in the United States and elsewhere, poverty has become tragically associated with the inner city , in France, it is more commonly linked to the banlieues , sprawling areas of urban development that encircle the city proper. Meanwhile, across Europe and North America, the racially white people majority is, somewhat ironically, empirically the most segregated group. Suburbs in the West, and increasingly, gated communities and other forms of “privatopia” around the world, enable local elites to meticulously self-segregate into secure and exclusive neighborhoods , further reinforcing social divides. [153]

Landless urban workers, a growing stratum of society in this age of urbanization , stand in stark contrast to their rural counterparts, the peasants . These workers, often termed the proletariat , represent a significant and expanding demographic. In Marxist doctrine, the proletariat is envisioned as an inevitable force that will, as their ranks swell with disenfranchised and disaffected individuals lacking any meaningful stake clarification needed in the status quo , eventually revolt against the entrenched bourgeoisie . [154] However, the global urban proletariat of today, often struggling in the informal economy, generally lacks the collective power and strategic position that 19th-century factory workers possessed, which granted them access to the very means of production . [155] The dynamics of urban struggle have, it seems, grown more complex.

Economics

Clusters of towering skyscrapers in Xinyi Planning District , the undeniable epicenter of commerce and finance in Taipei , the capital of Taiwan , symbolize the relentless drive of urban economics.

Historically, cities have existed in a symbiotic, if often exploitative, relationship with rural areas . They depend entirely on these rural peripheries for intensive farming to yield surplus crops , which in turn sustain the concentrated urban populations. In exchange for this vital sustenance, cities provide money, political administration, manufactured goods, and a vibrant, often intoxicating, culture. [28] [29] Urban economics , in its analytical approach, often extends its gaze beyond mere city limits to encompass larger agglomerations, recognizing that a more complete understanding of the local labor market requires this broader perspective. [156]

As the undeniable hubs of trade and exchange, cities have, for millennia, been the natural home for retail commerce and mass consumption , facilitated through the intricate interface of shopping . In the 20th century, the advent of grand department stores , deploying innovative techniques of advertising , sophisticated public relations , elaborate decoration , and cutting-edge design , fundamentally transformed urban shopping areas. These spaces evolved into veritable “fantasy worlds ,” meticulously crafted to encourage self-expression and offer an escape through the seductive allure of consumerism . [157] [158]

In a broader sense, the inherent density of cities acts as a powerful accelerator for commerce, significantly expediting transactions and facilitating crucial “knowledge spillovers .” This close proximity encourages people and firms to exchange information more readily and to generate new ideas at an accelerated pace. [159] [160] A more robust and “thicker” labor market, characteristic of urban environments, allows for a superior matching of skills between employers and individuals, theoretically leading to greater efficiency. Furthermore, population density enables the shared utilization of common infrastructure and production facilities. However, in exceptionally dense cities, this concentration can also lead to negative effects, such as increased crowding, frustrating waiting times, and a general sense of urban friction. [161]

While manufacturing once served as the primary engine for the growth of many cities, a significant number of urban centers now rely predominantly on a tertiary sector of the economy or a service economy . The services in question are remarkably diverse, spanning the spectrum from tourism , the intricate demands of the hospitality industry , various forms of entertainment , and essential housekeeping , to the more specialized “grey-collar ” work found in fields such as law , financial consulting, and administrative management . [97] [162]

According to a scientific model of cities developed by Professor Geoffrey West , a rather intriguing statistical pattern emerges: with every doubling of a city’s size, salaries per capita generally experience a corresponding increase of 15%. [163] A compelling argument, perhaps, for the economic benefits of urban scale, despite its inherent chaos.

Culture and communications

Paris , often romanticized and undeniably iconic, stands as one of the best-known cities in the world, a global symbol of culture and aspiration. [164] Nepalese dancers at the Edmonton Heritage Festival , in Alberta , Canada, offer a vibrant example of the rich cultural diversity that thrives within a modern city.

Cities, almost by definition, serve as the pulsating hubs for education and the arts , acting as vital repositories and incubators of human knowledge and creativity. They provide the necessary infrastructure and environment to support grand universities , venerable museums , sacred temples , and a multitude of other cultural institutions . [165] These urban landscapes are often adorned with impressive displays of architecture , ranging from the exquisitely small to the monumentally enormous, from the ornately decorative to the starkly brutalist architecture . Skyscrapers , those audacious vertical statements, offering thousands of offices or homes within a remarkably small footprint and visible from miles away, have become the quintessential, iconic features of the modern city. [166] Cultural elites, those individuals possessed of significant cultural capital , tend to gravitate towards cities, forming interconnected networks that, not infrequently, play a subtle yet influential role in governance. [167] By virtue of their status as centers of culture, intellectual ferment, and widespread literacy, cities can, with considerable justification, be described as the very locus of civilization , the crucible of human history , and the primary engine of social change . [168] [169]

The inherent density of urban environments, a characteristic often bemoaned, is paradoxically highly conducive to effective mass communication and the rapid transmission of news . This occurs through traditional means like heralds and printed proclamations , the widespread dissemination of newspapers , and, in the modern era, the instantaneous reach of digital media. These intricate communication networks, while still fundamentally relying on cities as their central hubs, now penetrate extensively into virtually all populated areas. In this age of rapid communication and ubiquitous transportation, some commentators have gone so far as to describe urban culture as nearly omnipresent, [170] [171] [172] or even, more provocatively, as a concept that has become so diluted as to be no longer truly meaningful. [173]

Today, a city’s strategic promotion of its cultural activities is inextricably linked with the concepts of place branding and city marketing . These sophisticated public diplomacy techniques are meticulously employed to inform development strategy, to attract businesses, investors, new residents, and, of course, tourists, and to cultivate a shared identity and a profound sense of place within the metropolitan area. [174] [175] [176] [177] Physical inscriptions, commemorative plaques , and imposing monuments displayed throughout the urban landscape serve to physically transmit a historical context, anchoring contemporary urban places to their past. [178] Some cities, such as the sacred Jerusalem , Mecca , and Rome , possess an indelible religious status, having for hundreds of years drawn countless pilgrims from across the globe. Patriotic tourists flock to Agra to marvel at the iconic Taj Mahal , or to New York City to visit the poignant World Trade Center (2001–present) . Devoted Elvis enthusiasts make the pilgrimage to Memphis, Tennessee to pay their respects at Graceland . [179] These “place brands”—which encompass both place satisfaction and place loyalty—hold immense economic value, comparable to the value of commercial brands , due to their significant influence on the decision-making processes of individuals and businesses contemplating engaging with—or “purchasing” (the brand of)—a particular city. [177]

The ancient Roman concept of “Bread and circuses ,” among other forms of cultural appeal, continues to effectively attract and entertain the masses . [109] [180] Beyond mere entertainment, sports also play a profoundly significant role in city branding and the formation of local identity (social science) . [181] Cities, in their relentless quest for global recognition, go to considerable lengths and expense in fierce competition to host prestigious events like the Olympic Games , which promise unparalleled global attention and a surge in tourism. [182] Paris , a city already steeped in cultural history, was the recent host of the Olympic Games in the summer of 2024, further cementing its global profile. [183]

Warfare

The devastating atomic bombing of Hiroshima on 6 August 1945 not only annihilated the city but directly precipitated Imperial Japan’s surrender , bringing a cataclysmic end to World War II .

Cities, by virtue of their concentrated economic, demographic, symbolic, and political centrality, inevitably play a crucial strategic role in warfare. For these very same reasons, they are often prime targets in forms of asymmetric warfare . Countless cities throughout history were founded under explicit military auspices, a great many incorporated formidable fortifications into their very design, and military principles continue to subtly influence urban design even today. [184] Indeed, it has been argued that the brutal necessity of war may have served as the fundamental social rationale and economic basis for the very earliest cities, a rather grim origin story. [51] [52]

Powers embroiled in geopolitical conflict have, throughout history, established fortified settlements as integral components of broader military strategies. This can be seen in the establishment of garrison towns, America’s controversial Strategic Hamlet Program during the Vietnam War , and the ongoing phenomenon of Israeli settlements in Palestine. [185] During the Philippine–American War , for instance, while occupying the Philippines , the U.S. Army issued orders for local populations to concentrate within cities and towns. This strategic maneuver was intended to isolate committed insurgents in the countryside, allowing the military to engage them more freely. [186] [187]

Urban warfare has, on multiple occasions, proven decisively pivotal. The Battle of Stalingrad during World War II stands as a harrowing example, where Soviet forces, amidst extreme casualties and catastrophic destruction, ultimately repulsed German occupiers. In an era characterized by low-intensity conflict and relentless urbanization , cities have become persistent sites of long-term conflict, waged both by foreign occupiers and by local governments against internal insurgency . [155] [188] Such warfare, known as counterinsurgency , involves a complex array of techniques, including pervasive surveillance and sophisticated psychological warfare , alongside brutal close combat . [189] This functionally extends the principles of modern urban crime prevention , which already employs concepts such as defensible space theory . [190]

While capture is often the primary objective, warfare has, in some extreme cases, culminated in the complete and utter destruction of a city. Ancient Mesopotamian cuneiform script tablets and archaeological ruins bear silent witness to such annihilations, [191] as does the chilling Latin motto Carthago delenda est , a stark declaration of utter obliteration. [192] [193] Following the horrific atomic bombings of Hiroshima and Nagasaki and throughout the terrifying expanse of the Cold War , nuclear strategists continued to contemplate the use of “counter-value ” targeting: the deliberate crippling of an enemy by annihilating its valuable cities, rather than aiming primarily at its military forces . [194] [195] A chilling reminder of humanity’s capacity for self-destruction.

Climate change

Main article: Climate change and cities This section is an excerpt from Climate change and cities .[edit]

Jakarta was identified as the most vulnerable city to the pervasive effects of climate change in Indonesia in a 2021 study by Verisk Maplecroft . [196] The intricate relationship between climate change and cities is undeniable and profoundly interconnected. Cities, in their immense scale and activity, are simultaneously one of the greatest contributors to the problem and, somewhat ironically, represent one of the most promising opportunities for effectively addressing climate change . [197] Conversely, cities are also among the most vulnerable components of human society to the escalating effects of climate change , [198] yet they also hold the potential to be one of the most crucial solutions for significantly reducing the overall environmental impact of humans . [199] [197] [198] The United Nations projects that a staggering 68% of the world’s population will reside in urban areas by 2050, further intensifying this relationship. [200] In 2016, 31 megacities reported populations of at least 10 million, with a disconcerting eight of these surpassing 20 million people. [201] However, it is the rapid proliferation of “secondary cities "—small to medium-sized urban centers (ranging from 500,000 to 1 million inhabitants)—that are increasing in number and contributing significantly to the escalating impacts of climate change. [202] Cities exert a profound influence on construction and transportation, two sectors that are among the primary contributors to global warming emissions. [203] Moreover, due to processes that generate climate conflict and compel the displacement of climate refugees , urban areas are projected to expand dramatically over the coming decades, placing immense strain on existing infrastructure and tragically concentrating more impoverished peoples in cities . [204] [205] Hamburg , Germany , a major port city, has, for example, experienced multiple severe droughts over the years, leading to demonstrable decreases in economic productivity. [206]

High population density and the pervasive urban heat island effect are glaring examples of the localized weather changes that directly impact cities due to climate change. This phenomenon also exacerbates existing problems such as pervasive air pollution, chronic water scarcity , and the increased incidence of heat illness within metropolitan areas. Furthermore, given that the vast majority of cities have historically been constructed along rivers or in vulnerable coastal areas, they are frequently exposed to the severe subsequent effects of sea level rise , which inevitably leads to widespread flooding and relentless coastal erosion . These effects are, in turn, intricately linked with other pressing urban environmental problems, including land subsidence and the dangerous depletion of aquifer recharge .

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A report compiled by the C40 Cities Climate Leadership Group brought to light a rather inconvenient truth: consumption-based emissions within cities have a significantly greater impact than those derived from production. The report estimated that a staggering 85% of the emissions linked to goods consumed within a city are, in fact, generated outside that city’s boundaries. [207] This implies a global responsibility, not just a local one. Investments in both climate change adaptation and mitigation in cities will be absolutely critical in reducing the impacts stemming from some of the largest contributors of greenhouse gas emissions. For instance, increased urban density theoretically allows for the strategic redistribution of land use for agriculture and reforestation . It also presents opportunities for improving transportation efficiencies and promoting greener construction practices (a vital necessity given cement’s outsized role in climate change and the ongoing advancements in sustainable construction practices and weatherization ). It seems cities, in their endless complexity, are both the cause and the potential cure for many of humanity’s self-inflicted wounds.

Infrastructure

Traffic congestion in Bandung , Indonesia, a familiar urban blight in countless cities around the world.

Urban infrastructure encompasses the vast, often invisible, network of physical systems and spaces that are absolutely indispensable for the functioning of transportation, water supply, energy distribution, recreation, and various public functions. [208] The initial cost of establishing this infrastructure, particularly the fixed capital investment, is invariably high. However, once in place, the marginal costs of operating and maintaining these systems are comparatively lower, leading to positive economies of scale . [209] Due to these inherently high barriers to entry , these critical networks have frequently been classified as natural monopolies , meaning that economic logic, in its cold efficiency, often favors the control of each network by a single organization, whether public or private. [126] [210]

Infrastructure, in its broadest sense, plays an undeniably vital role in a city’s capacity for economic activity and sustained expansion. It underpins the very survival of the city’s inhabitants, supporting technological advancement, commercial endeavors, industrial production, and the intricate web of social activities. [208] [209] Structurally, many infrastructure systems are designed as resilient networks featuring redundant links and multiple pathways. This redundancy ensures that the system as a whole can continue to operate, albeit perhaps with reduced efficiency, even if individual parts of it experience failure. [210] The specific characteristics of a city’s infrastructure systems often exhibit historical path dependence , meaning that new development is inevitably constrained and shaped by what already exists, a legacy of past decisions and investments. [209]

Massive megaprojects , such as the construction of sprawling airports , colossal power plants , and extensive railways , demand enormous upfront investments. Consequently, these undertakings typically necessitate substantial funding from either national governments or the private sector. [211] [210] The trend of privatization, increasingly common, may extend to all levels of infrastructure construction and ongoing maintenance. [212]

While urban infrastructure ideally serves all residents equally, in practice, its distribution and quality can prove notoriously uneven. In some cities, there are regrettably clear “first-class” and “second-class” alternatives, reflecting deep-seated social and economic disparities. [213] [214] [126]

Utilities

The Aqueduct of Segovia in Segovia, Spain, stands as an ancient marvel of engineering, a timeless testament to the crucial role of water utilities.

Public utilities , quite literally “useful things with general availability,” encompass the fundamental and essential infrastructure networks that underpin modern urban life. These are chiefly concerned with the reliable supply of water, electricity, and telecommunications capabilities to the populace. [215]

Sanitation , an absolute necessity for maintaining good health in densely populated urban conditions, demands not only a reliable water supply and efficient waste management but also consistent individual hygiene . Urban water systems primarily consist of a complex water supply network and an equally intricate network (sewerage system ) for the collection and conveyance of both sewage and stormwater . Historically , the administration of urban water supply has oscillated between local governments and private companies. The 20th century saw a tendency towards government-controlled water supply, while the turn of the twenty-first century has witnessed a renewed, if controversial, trend towards private operation. [126] [b] The market for private water services is, rather alarmingly, dominated by just two French multinational corporations: Veolia Water (formerly Vivendi ) and Engie (formerly Suez (company, 1997–2008) ), which are reported to hold a staggering 70% of all water contracts worldwide. [126] [217]

Modern urban existence is profoundly reliant on the consistent flow of energy , primarily transmitted through electricity . This powers the myriad electric machines that define daily life, from ubiquitous household appliances to massive industrial machines , and the now-inescapable electronic systems used for communications, business, and government. Electricity also illuminates our streets with traffic lights and street lights , and provides essential indoor lighting . Cities also depend, albeit to a lesser extent, on hydrocarbon fuels such as gasoline and natural gas for transportation, heating , and cooking . Telecommunications infrastructure, including the dense webs of telephone lines and coaxial cables , crisscross cities, forming intricate networks essential for both mass and point-to-point (telecommunications) communications. [218] It’s a complex, energy-hungry ecosystem that, when it falters, brings modern life to a grinding halt.

Transportation

See also: Public transport

The Gautrain at O. R. Tambo International Airport in Johannesburg, a modern link for a bustling city. TransJakarta in Indonesia, proudly holding the title of the world’s longest bus rapid transit system, a testament to mass transit ambition. Baana , a shared-use path rail trail in Helsinki , offers a refreshing alternative for urban mobility.

Because cities inherently rely on specialized labor and an economic system built upon wage labor , their inhabitants are compelled to possess the means to regularly commute between their homes, workplaces, commercial centers, and entertainment venues. [219] City dwellers navigate these complex urban landscapes either by foot, by wheel on designated roads and walkways , or by utilizing specialized rapid transit systems that traverse underground tunnels , run overground , or glide along elevated railways . Cities also maintain critical long-distance transportation links—via trucks, rail transport , and airplanes —to facilitate essential economic connections with other cities and the rural areas that sustain them. [220]

Historically, city streets were primarily the domain of horses and their riders, alongside countless pedestrians , who only sporadically benefited from designated sidewalks or special walking areas . [221] In the West, bicycles (or velocipedes ), marvelously efficient human-powered machines ideal for short- and medium-distance travel, [222] enjoyed a period of considerable popularity at the dawn of the twentieth century, before the irresistible rise of the automobile. [223] Shortly thereafter, bicycles found a more enduring foothold in Asian and African cities, often under the influence of European colonial powers. [224] In Western cities, the industrialization, electrification , and relentless expansion of public transit systems, particularly streetcars , served as a powerful engine for urban growth. New residential neighborhoods sprang up along these transit lines, allowing workers to commute efficiently to and from their downtown workplaces. [220] [225]

Since the mid-20th century, cities worldwide have grown profoundly reliant on motor vehicle transportation, a shift with colossal implications for their physical layout, environmental quality, and aesthetic character. [226] (This transformation was particularly dramatic in the United States , where corporate and governmental policies actively favored automobile-centric transport systems, and to a lesser extent in Europe.) [220] [225] The proliferation of personal cars coincided with the expansion of urban economic areas into much larger metropolises , inevitably giving rise to ubiquitous traffic issues. This, in turn, necessitated the construction of vast new highways , the widening of existing streets, and the creation of alternative walkways for pedestrians. [227] [228] [229] [175] Despite these extensive efforts, severe traffic jams remain a regular, soul-crushing occurrence in cities across the globe, as private car ownership and relentless urbanization continue to surge, overwhelming existing urban street networks . [136]

The urban bus system , globally the most common form of public transport, operates a network of scheduled routes to move people through the city, sharing the roads alongside private cars. [230] The economic function of cities also underwent a significant decentralization during this period, as the practicalities of extreme concentration became untenable, prompting employers to relocate to more car-friendly locations, including the aforementioned edge cities . [220] In an effort to combat pervasive congestion, some cities have introduced bus rapid transit (BRT) systems, which incorporate exclusive bus lanes and other innovative methods designed to prioritize bus traffic over private automobiles. [136] [231] Many large American cities, despite the national embrace of the car, still maintain and operate conventional public transit systems by rail, famously exemplified by the perpetually busy New York City Subway system. Rapid transit, meanwhile, is widely utilized across Europe and has seen substantial expansion in Latin America and Asia. [136]

The seemingly simple acts of walking and cycling (collectively termed “non-motorized transport”) are experiencing a resurgence in favor within American and Asian urban transportation planning. This renewed interest is driven by influential trends such as the Healthy Cities movement, the urgent drive for sustainable development , and the visionary concept of a carfree city , leading to the creation of more pedestrian zones and dedicated bike lanes . [136] [232] [233] Techniques such as road space rationing and strategically implemented road use charges have also been introduced in various cities to actively limit urban car traffic, a desperate attempt to reclaim some semblance of order. [136]

Housing

Horbury Terrace, a classic example of terrace housing in Sydney , dating back to approximately 1836.

The provision of adequate housing for its residents presents one of the most fundamental and persistent challenges that every city must grapple with. Adequate housing extends beyond mere physical shelters ; it encompasses the entire suite of physical systems necessary to sustain life and economic activity within those shelters. [234]

Homeownership is often seen as a marker of status and a modest degree of economic security, a stark contrast to renting , which can consume a disproportionately large portion of the income of low-wage urban workers. Homelessness , the tragic absence of housing, remains a pervasive challenge faced by millions of people in countries across the entire spectrum of wealth, from the richest to the poorest. Because cities, by their very nature, exhibit significantly higher population densities than rural areas, city dwellers are, predictably, far more likely to reside in apartments and considerably less likely to inhabit a single-family detached home . It is a simple matter of space, or the lack thereof.

Ecology

Main article: Urban ecology

An urban scene in Paramaribo featuring a few resilient plants struggling amidst discarded municipal solid waste and rubble behind some houses, a stark illustration of human impact. An urban heat island , a common consequence of dense urban development. St Stephen’s Green , a verdant urban park in Dublin , Ireland, offering a vital green lung within the city.

Urban ecosystems , profoundly influenced as they are by the relentless density of human buildings and activities, diverge considerably from the more natural ecosystems of their rural surroundings. Anthropogenic buildings and the ceaseless generation of waste , alongside the deliberate cultivation of gardens , create unique physical and chemical environments that find no true equivalents in the untamed wilderness . In some peculiar instances, these altered conditions can even foster exceptional biodiversity . These urban environments provide homes not only for the waves of human immigrants but also for countless immigrant plants , leading to novel interactions between species that, by all rights, should never have encountered each other. They introduce frequent disturbances (ecology) (from constant construction to the simple act of walking) to existing plant and animal habitats , thereby creating perpetual opportunities for recolonization and, consequently, favoring young ecosystems dominated by opportunistic, r-selected species . On the whole, urban ecosystems are typically less complex and less productive than their natural counterparts, a direct consequence of the diminished absolute amount of biological interactions that can occur within them. [236] [237] [238] [239]

The typical urban fauna includes the ubiquitous presence of insects (particularly resilient ants ), the often-unseen legions of rodents (mice , rats ), and a variety of birds , alongside the ever-present cats and dogs —both domesticated and the more self-sufficient feral populations. Large predators are, predictably, scarce in these human-dominated landscapes. [238] However, in North America, some larger predators, such as coyotes, and other substantial animals like white-tailed deer, demonstrate a surprising persistence and adaptability within urban fringes. [240]

Cities, in their concentrated existence, generate considerable ecological footprints , impacting not only their immediate surroundings but also distant ecosystems, a consequence of their dense populations and intense technological activities. From one perspective, cities are inherently not ecologically sustainable due to their insatiable resource needs. From another, a more optimistic view suggests that proper management and thoughtful planning may be able to significantly ameliorate a city’s detrimental effects. [241] [242] Air pollution is a pervasive problem, arising from various forms of combustion, [243] including domestic fireplaces, wood or coal-burning stoves, other heating systems, [244] and, crucially, the millions of internal combustion engines that power urban transportation. Industrialized cities of the past, and today’s burgeoning megacities in the developing world, are notorious for the suffocating veils of smog (a noxious industrial haze ) that frequently envelop them, posing a chronic and severe threat to the health of their millions of inhabitants. [245] Urban soil, often overlooked, contains significantly higher concentrations of heavy metals (particularly lead , copper , and nickel ) and exhibits a lower pH compared to soil found in comparable wilderness areas—a subtle but pervasive form of environmental degradation. [238]

Modern cities are infamous for creating their own distinct microclimates , a direct result of the vast expanses of concrete , asphalt concrete , and other artificial surfaces. These materials absorb and radiate heat under sunlight and channel rainwater directly into efficient, but environmentally problematic, underground ducts . The average temperature in New York City , for instance, consistently exceeds nearby rural temperatures by an average of 2–3°C, and at times, differences of 5–10°C have been recorded. This “urban heat island ” effect varies nonlinearly with population changes, independently of the city’s physical size. [238] [246] Furthermore, aerial particulates suspended in the urban atmosphere can increase local rainfall by 5–10%. Consequently, urban areas experience unique climates, with earlier flowering of plants and later leaf dropping compared to surrounding rural areas. [238]

It’s a stark reality that poor and working-class people disproportionately face exposure to these environmental risks, a phenomenon known as environmental racism when it intersects with racial segregation. For example, within the urban microclimate, less-vegetated poor neighborhoods bear a greater burden of the heat, yet possess fewer resources to cope with its effects. [247]

One of the primary and most effective methods for improving the urban ecology is the deliberate integration of more urban green spaces within cities. This includes establishing parks, creating community gardens, maintaining lawns, and planting trees. These green areas significantly improve the health and well-being of the human, animal, and plant populations residing within urban centers. [248] Well-maintained urban trees, in particular, can provide a multitude of social, ecological, and physical benefits to a city’s residents. [249]

A study published in Scientific Reports in 2019 yielded rather compelling evidence: individuals who spent at least two hours per week immersed in nature were found to be 23 percent more likely to express satisfaction with their lives and a remarkable 59 percent more likely to report being in good health, compared to those with no exposure to nature. The study, drawing on data from nearly 20,000 people in the United Kingdom , also revealed that these benefits continued to increase for exposure durations up to 300 minutes. The positive effects were observed across diverse demographics, applying to men and women of all ages, various ethnicities, different socioeconomic statuses, and even individuals living with long-term illnesses and disabilities. Crucially, those who failed to accumulate at least two hours of nature exposure—even if they surpassed an hour per week—did not experience these significant benefits. This study represents the latest addition to a growing and compelling body of evidence supporting the health benefits of engaging with nature. Indeed, many medical professionals are already prescribing time in nature to their patients. While the study did not count time spent in a person’s private yard or garden as “time in nature,” the majority of the nature visits recorded in the study occurred within two miles of the participants’ homes. Dr. White, commenting on the findings, noted in a press release, “Even visiting local urban green spaces seems to be a good thing. Two hours a week is hopefully a realistic target for many people, especially given that it can be spread over an entire week to get the benefit.” [250] It seems even a weary cynic might concede the value of a well-placed tree.

World city system

As the world inevitably becomes more intricately linked through the relentless forces of economics, politics, technology, and culture—a pervasive process known as globalization —cities have, perhaps surprisingly, assumed a leading role in transnational affairs. Their influence now often transcends the traditional limitations of international relations conducted solely by national governments. [251] [252] [253] This phenomenon, which appears resurgent today, is not entirely new; its roots can be traced back to ancient trade networks like the Silk Road , the maritime empires of Phoenicia , and the independent Greek city-states, extending through the medieval Hanseatic League and various other historical alliances of cities. [254] [255] [256] In the modern era, the information economy , powered by high-speed Internet infrastructure, enables instantaneous telecommunication across the globe, effectively annihilating geographical distance for the purposes of international markets, high-level economic transactions, personal communications, and the ubiquitous reach of mass media . [257]

Global city

Stock exchanges , those bustling, interconnected hubs for capital, are characteristic features of the world’s top global cities. Here, a delegation from Australia visits the historic London Stock Exchange .

A global city , often interchangeably referred to as a world city, distinguishes itself as a preeminent center of trade, banking, finance, innovation, and dynamic markets. [258] [259] Saskia Sassen , in her influential 1991 work, The Global City: New York, London, Tokyo, coined and utilized the term “global city” not primarily to denote a city’s sheer size, but rather to emphasize its inherent power (social and political) , its international status, and its pervasive cosmopolitanism. [260] Following this conceptual framework, it becomes possible to hierarchically rank the world’s cities . [261] Global cities, in this model, form the very capstone of the global hierarchy, exerting considerable “command and control ” through their profound economic and political influence. These cities may have achieved their exalted status through an early and successful transition to post-industrialism , [262] or through a powerful inertia that has allowed them to maintain their dominance from the preceding industrial era. [263] This type of ranking, it must be noted, exemplifies an emerging discourse in which cities, often viewed as variations on a singular ideal type, are compelled to compete fiercely with one another on a global stage in order to achieve prosperity—a rather bleak race to the top. [182] [175]

Critics of this rather narrow notion of the “global city” often point to the diverse realms of power and interchange that it tends to overlook. The term “global city” is, critics argue, heavily influenced by purely economic factors, and thus may fail to adequately account for places that are significant in other, non-financial ways. Paul James (academic) , for instance, contends that the term is “reductive and skewed” in its almost exclusive focus on financial systems, neglecting the cultural, political, and social dimensions that also define a city’s global reach. [264]

Powerful multinational corporations and influential banks strategically locate their headquarters in global cities, conducting a significant portion of their business within these concentrated economic environments. [265] American firms, in particular, often dominate the international markets for specialized services such as law and engineering , maintaining extensive branches in the largest foreign global cities. [266]

Within these colossal global cities, a stark and often alarming divide exists between populations at both ends of the financial spectrum. [267] Regulations on immigration, often designed with economic rather than humanitarian goals in mind, can inadvertently promote the exploitation of both low-skilled and high-skilled immigrant workers who arrive from poorer regions. [268] [269] [270] During their employment, migrant workers are frequently subjected to unfair working conditions, which can include excessive overtime, meager wages, and a perilous lack of safety in their workplaces. [271] It seems the glittering facade of the global city often conceals a much harsher reality.

Modern global cities, such as the sprawling New York City , typically feature immense central business districts (CBDs) that serve as the pulsating hubs of economic activity. A panoramic view of Manhattan , renowned as the world’s largest central business district, captured in February 2018, strikingly displays its prominent buildings, each highlighted by number:

• Riverside Church
• Deutsche Bank Center
• 220 Central Park South
• Central Park Tower
• One57
• 432 Park Avenue
• 53W53
• Chrysler Building
• Bank of America Tower (Manhattan)
• 4 Times Square
• The New York Times Building
• Empire State Building
• Manhattan West (a: 55 Hudson Yards , b: 35 Hudson Yards , c: 10 Hudson Yards , d: 15 Hudson Yards )
• 56 Leonard Street
• 8 Spruce Street
• Woolworth Building
• 70 Pine Street
• Four Seasons Hotel New York Downtown
• 40 Wall Street
• 3 World Trade Center
• 4 World Trade Center
• One World Trade Center

Transnational activity

Cities, with increasing frequency, are engaging in world political activities with a surprising degree of independence from their encompassing nation-states. Early manifestations of this phenomenon include the establishment of “sister city” relationships and the active promotion of multi-level governance within the European Union as a strategic technique for fostering European integration . [252] [272] [273] Cities such as Hamburg , Prague , Amsterdam , The Hague , and the distinct City of London even maintain their own dedicated embassies to the European Union at Brussels , a clear indication of their direct engagement in international diplomacy. [274] [275] [276]

A new breed of urban dweller is emerging: the “transmigrant ,” individuals who, through the pervasive reach of telecommunications if not constant physical travel, maintain a foot in both their old and new homes. [277] This phenomenon further blurs traditional notions of national allegiance and local identity.

Global governance

Cities are increasingly active participants in the complex machinery of global governance , engaging through various means, most notably through membership in global networks that disseminate norms and regulations. At the broad, global level, United Cities and Local Governments (UCLG) functions as a significant umbrella organization for cities worldwide. Regionally and nationally, organizations such as Eurocities , the Asian Network of Major Cities 21 , the Federation of Canadian Municipalities , the National League of Cities , and the United States Conference of Mayors play analogous roles, advocating for urban interests at different scales. [278] [279] UCLG notably assumed responsibility for the creation of Agenda 21 for culture , an ambitious program outlining cultural policies aimed at promoting sustainable development, and has actively organized numerous conferences and reports to advance its objectives. [280]

These urban networks have become particularly prevalent and influential in the critical arena of environmentalism , and more specifically, in addressing the urgent challenges of climate change , following the adoption of Agenda 21 . Prominent environmental city networks include the influential C40 Cities Climate Leadership Group , the United Nations Global Compact Cities Programme , the Carbon Neutral Cities Alliance (CNCA), the Covenant of Mayors and the Compact of Mayors (now merged into the Global Covenant of Mayors ), [281] ICLEI – Local Governments for Sustainability , and the grassroots Transition Towns network . [278] [279] These organizations represent a collective effort by cities to address global challenges at a local level.

Cities also hold significant world political status as crucial meeting places for a diverse array of advocacy groups, non-governmental organizations , influential lobbyists, academic institutions, intelligence agencies, military contractors, information technology firms, and countless other groups with a vested interest in shaping world policymaking. Consequently, they are also frequently chosen as prominent sites for symbolic protest, where dissent can be amplified on a global stage. [255] [c]

South Africa , for instance, experiences one of the highest rates of public protests in the world, a stark illustration of cities as arenas for social and political contention. [282]

United Nations System

The World Bank headquarters in Washington, D.C. , a global financial nerve center. The World Assembly of Mayors convenes at the Habitat III conference in Quito , a gathering of urban leaders addressing global challenges.

The United Nations System has been deeply engaged in a continuous series of events and declarations specifically addressing the development of cities during this unprecedented period of rapid urbanization .

• The Habitat I conference, held in 1976, culminated in the adoption of the “Vancouver Declaration on Human Settlements.” This landmark document explicitly identified urban management as a fundamental aspect of economic development and laid out various principles for maintaining healthy and functional urban habitats . [283]
• Citing the foundational Vancouver Declaration, the UN General Assembly, in December 1977, authorized the establishment of the United Nations Commission on Human Settlements and the HABITAT Centre for Human Settlements. These bodies were specifically tasked with coordinating UN activities related to housing and human settlements worldwide. [284]
• The pivotal 1992 Earth Summit in Rio de Janeiro resulted in a comprehensive set of international agreements, most notably Agenda 21 . This document established a detailed framework of principles and plans for achieving sustainable development on a global scale. [285]
• The Habitat II conference in 1996 issued a call for cities to assume a leading role in implementing the ambitious Agenda 21 program. This subsequently advanced the broader objectives of the Millennium Development Goals and, later, the Sustainable Development Goals . [286]
• In January 2002, the UN Commission on Human Settlements was elevated and reorganized into an umbrella agency known as the United Nations Human Settlements Programme , or UN-Habitat. This entity became a crucial member of the United Nations Development Group , further integrating urban issues into the UN’s broader development agenda. [284]
• The Habitat III conference, held in 2016, focused intently on the implementation of these goals under the banner of a “New Urban Agenda.” The conference envisioned four primary mechanisms for effectively realizing this agenda: (1) the development of national policies that actively promote integrated sustainable development, (2) the strengthening of urban governance structures, (3) the implementation of long-term, integrated urban and territorial planning, and (4) the establishment of effective financing frameworks. [287] [288] Coincidentally, just prior to this conference, the European Union concurrently approved its own “Urban Agenda for the European Union,” famously known as the Pact of Amsterdam . [287]

UN-Habitat serves as the central coordinating body for the U.N.’s urban agenda, working in close collaboration with the UN Environmental Programme , the UN Development Programme , the Office of the High Commissioner for Human Rights , the World Health Organization , and the powerful World Bank . [284]

The World Bank , a specialized agency within the U.N. system, has been a primary force in promoting the various Habitat conferences. Since the very first Habitat conference, the Bank has utilized their declarations as a guiding framework for issuing loans specifically for urban infrastructure projects. [286] The Bank’s structural adjustment programs, implemented in many developing nations, inadvertently contributed to urbanization in the “Third World ” by creating economic incentives that encouraged rural populations to migrate to cities. [289] [290] In 1999, the World Bank and UN-Habitat jointly established the Cities Alliance (headquartered at the World Bank in Washington, D.C. ). This initiative was designed to guide policymaking, facilitate knowledge sharing, and distribute grants (money) specifically addressing the complex issue of urban poverty. [291] (UN-Habitat, in this partnership, plays an advisory role, evaluating the quality of a locality’s governance.) [146] The Bank’s policies have tended to focus heavily on bolstering real estate markets through the provision of credit and technical assistance, a rather specific approach to urban development. [292]

The United Nations Educational, Scientific and Cultural Organization (UNESCO ) has increasingly directed its focus towards cities, recognizing them as pivotal sites for influencing cultural governance . It has developed various city networks, including the International Coalition of Cities against Racism and the Creative Cities Network. UNESCO’s unique capacity to designate World Heritage Sites grants the organization significant influence over cultural capital , tourism flows, and the allocation of historic preservation funding, thereby shaping the cultural trajectory of urban centers worldwide. [280]

Representation in culture

Further information: Urban fiction

The Fall of Babylon, an 1831 masterpiece by John Martin (painter) , dramatically portrays chaos as the Persian army occupies Babylon , serving as a powerful symbol for the ruin of a decadent civilization. The lightning bolt striking the Babylonian ziggurat is a clear visual reference to the Tower of Babel and, more broadly, to God’s judgment against Babylon.

Cities, in their multifaceted grandeur and inherent contradictions, figure prominently in traditional Western culture, appearing as powerful archetypes in the Bible in both their most evil and most holy manifestations, famously symbolized by the decadent Babylon and the sacred Jerusalem . Cain and Nimrod are presented in the Book of Genesis as the very first city builders, while in Sumerian mythology, the legendary Gilgamesh is credited with constructing the formidable walls of Uruk .

Cities are often perceived in terms of stark extremes or inherent opposites: simultaneously liberating and oppressive, overflowing with wealth yet steeped in poverty, meticulously organized yet prone to utter chaos. [294] The term “anti-urbanism ” refers to various ideological oppositions to cities, whether stemming from a disdain for their culture or a rejection of their political relationship with the country . Such opposition can arise from the identification of cities with oppression and the entrenched ruling elite . [295] These and other political ideologies profoundly influence the narratives and themes that permeate discourse about cities, shaping how they are understood and portrayed. [14] In turn, cities themselves often serve as powerful symbols of their home societies, encapsulating national aspirations and anxieties. [296]

Writers, painters, and filmmakers, in their endless fascination with the urban experience, have produced an innumerable body of art. Classical and medieval literature, for example, features a distinct genre of descriptiones , which meticulously detail the features and history of cities. Modern literary giants such as Charles Dickens and James Joyce are celebrated for their evocative and deeply atmospheric descriptions of their home cities, which become characters in their own right. [297] The legendary German film director Fritz Lang famously conceived the seminal idea for his influential 1927 film, Metropolis (1927 film) , while visiting Times Square in 1923 and being utterly mesmerized by the nighttime spectacle of neon lighting . [298] Other early cinematic representations of cities in the early twentieth century generally depicted them as technologically efficient spaces, with smoothly functioning systems of automobile transport, a utopian vision that would soon be shattered. By the 1960s, however, the grim reality of traffic congestion began to appear prominently in films such as The Fast Lady (1962) and Playtime (1967), reflecting a growing disillusionment with the urban dream. [226]

Literature, film, and other forms of popular culture have offered countless visions of future cities, ranging from the truly utopian to the starkly dystopian . The prospect of an ever-expanding, interconnected, and increasingly interdependent network of world cities has given rise to imaginative concepts such as Nylonkong (a portmanteau for New York, London, and Hong Kong) [299] and the grand, if somewhat terrifying