During the Holocene, the present geological epoch, an increasing portion of humans began to manipulate the reproduction of plants and animals in a series of environmental practices known as agriculture. No other ecological relationship sustains as many humans as farming; no other has transformed the landscape to the same extent. The domestication of plants by American Indians followed the end of the last glacial maximum (the Ice Age). About eight thousand years ago, the first domesticated maize and squash arrived from central Mexico, spreading to every region and as far north as the subarctic boreal forest. The incursion of Europeans into North America set off widespread deforestation, soil depletion, and the spread of settlement, followed by the introduction of industrial machines and chemicals. A series of institutions sponsored publically funded research into fertilizers and insecticides. By the late 19th century, writers and activists criticized the technological transformation of farming as destructive to the environment and rural society. During the 20th century, wind erosion contributed to the depopulation of much of the Great Plains. Vast projects in environmental engineering transformed deserts into highly productive regions of intensive fruit and vegetable production. Throughout much of the 19th and 20th centuries, access to land remained limited to whites, with American Indians, African Americans, Latinas/os, Chinese, and peoples of other ethnicities attempting to gain farms or hold on to the land they owned.
Two broad periods describe the history of agriculture and the environment in that portion of North America that became the United States. In the first, the environment dominated, forcing humans to adapt during the end of thousands of years of extreme climate variability. In the second, institutional and technological change became more significant, though the environment remained a constant factor against which American agriculture took shape. A related historical pattern within this shift was the capitalist transformation of the United States. For thousands of years, households sustained themselves and exchanged some of what they produced for money. But during the 19th century among a majority of American farmers, commodities took over the entire purpose of agriculture, transforming environments to reflect commercial opportunity.
Relations between the United States and Argentina can be best described as a cautious embrace punctuated by moments of intense frustration. Although never the center of U.S.–Latin American relations, Argentina has attempted to create a position of influence in the region. As a result, the United States has worked with Argentina and other nations of the Southern Cone—the region of South America that comprises Uruguay, Paraguay, Argentina, Chile, and southern Brazil—on matters of trade and economic development as well as hemispheric security and leadership. While Argentina has attempted to assert its position as one of Latin America’s most developed nations and therefore a regional leader, the equal partnership sought from the United States never materialized for the Southern Cone nation. Instead, competition for markets and U.S. interventionist and unilateral tendencies kept Argentina from attaining the influence and wealth it so desired. At the same time, the United States saw Argentina as an unreliable ally too sensitive to the pull of its volatile domestic politics. The two nations enjoyed moments of cooperation in World War I, the Cold War, and the 1990s, when Argentine leaders could balance this particular external partnership with internal demands. Yet at these times Argentine leaders found themselves walking a fine line as detractors back home saw cooperation with the United States as a violation of their nation’s sovereignty and autonomy. There has always been potential for a productive partnership, but each side’s intransigence and unique concerns limited this relationship’s accomplishments and led to a historical imbalance of power.
Brandon R. Byrd
Black internationalism describes the political culture and intellectual practice forged in response to slavery, colonialism, and white imperialism. It is a historical and ongoing collective struggle against racial oppression rooted in global consciousness. While the expression of black internationalism has certainly changed across time and place, black liberation through collaboration has been and remains its ultimate goal.
Since the emergence of black internationalism as a result of the transatlantic slave trade and during the Age of Revolutions, black women such as the poet Phyllis Wheatley and evangelist Rebecca Protten have been at its forefront. Their writings and activism espoused an Afro-diasporic, global consciousness and promoted the cause of universal emancipation. During the 19th century, black women internationalists included abolitionists, missionaries, and clubwomen. They built on the work of their predecessors while laying the foundations for succeeding black women internationalists in the early 20th century. By World War I, a new generation of black women activists and intellectuals remained crucial parts of the International Council of Women, an organization founded by white suffragists from the United States, and the Universal Negro Improvement Association, a global organization formally led by Jamaican pan-Africanist Marcus Garvey. But they also formed an independent organization, the International Council of Women of the Darker Races (ICWDR).
Within and outside of the ICWDR, black women from Africa and the African Diaspora faced and challenged discrimination on the basis of their sex and race. Their activism and intellectual work set a powerful precedent for a subsequent wave of black internationalism shaped by self-avowed black feminists.
The United States has shared an intricate and turbulent history with Caribbean islands and nations since its inception. In its relations with the Caribbean, the United States has displayed the dueling tendencies of imperialism and anticolonialism that characterized its foreign policy with South America and the rest of the world. For nearly two and a half centuries, the Caribbean has stood at the epicenter of some of the US government’s most controversial and divisive foreign policies. After the American Revolution severed political ties between the United States and the British West Indies, US officials and traders hoped to expand their political and economic influence in the Caribbean. US trade in the Caribbean played an influential role in the events that led to the War of 1812. The Monroe Doctrine provided a blueprint for reconciling imperial ambitions in the Caribbean with anti-imperial sentiment. During the mid-19th century, Americans debated the propriety of annexing Caribbean islands, especially Cuba. After the Spanish-American War of 1898, the US government took an increasingly imperialist approach to its relations with the Caribbean, acquiring some islands as federal territories and augmenting its political, military, and economic influence in others. Contingents of the US population and government disapproved of such imperialistic measures, and beginning in the 1930s the US government softened, but did not relinquish, its influence in the Caribbean. Between the 1950s and the end of the Cold War, US officials wrestled with how to exert influence in the Caribbean in a postcolonial world. Since the end of the Cold War, the United States has intervened in Caribbean domestic politics to enhance democracy, continuing its oscillation between democratic and imperial impulses.
Patrick William Kelly
The relationship between Chile and the United States pivoted on the intertwined questions of how much political and economic influence Americans would exert over Chile and the degree to which Chileans could chart their own path. Given Chile’s tradition of constitutional government and relative economic development, it established itself as a regional power player in Latin America. Unencumbered by direct US military interventions that marked the history of the Caribbean, Central America, and Mexico, Chile was a leader in movements to promote Pan-Americanism, inter-American solidarity, and anti-imperialism. But the advent of the Cold War in the 1940s, and especially after the 1959 Cuban Revolution, brought an increase in bilateral tensions. The United States turned Chile into a “model democracy” for the Alliance for Progress, but frustration over its failures to enact meaningful social and economic reform polarized Chilean society, resulting in the election of Marxist Salvador Allende in 1970. The most contentious period in US-Chilean relations was during the Nixon administration when it worked, alongside anti-Allende Chileans, to destabilize Allende’s government, which the Chilean military overthrew on September 11, 1973. The Pinochet dictatorship (1973–1990), while anti-Communist, clashed with the United States over Pinochet’s radicalization of the Cold War and the issue of Chilean human rights abuses. The Reagan administration—which came to power on a platform that reversed the Carter administration’s critique of Chile—reversed course and began to support the return of democracy to Chile, which took place in 1990. Since then, Pinochet’s legacy of neoliberal restructuring of the Chilean economy looms large, overshadowed perhaps only by his unexpected role in fomenting a global culture of human rights that has ended the era of impunity for Latin American dictators.
Vincent J. Cannato
The Ellis Island Immigration Station, located in New York Harbor, opened in 1892 and closed in 1954. During peak years from the 1890s until the 1920s, the station processed an estimated twelve million immigrants. Roughly 75 percent of all immigrants arriving in America during this period passed through Ellis Island. The station was run by the federal Immigration Service and represented a new era of federal control over immigration. Officials at Ellis Island were tasked with regulating the flow of immigration by enforcing a growing body of federal laws that barred various categories of “undesirable” immigrants. As the number of immigrants coming to America increased, so did the size of the inspection facility. In 1907, Ellis Island processed more than one million immigrants. The quota laws of the 1920s slowed immigration considerably and the rise of the visa system meant that Ellis Island no longer served as the primary immigrant inspection facility. For the next three decades, Ellis Island mostly served as a detention center for those ordered deported from the country.
After Ellis Island closed in 1954, the facility fell into disrepair. During a period of low immigration and a national emphasis on assimilation, the immigrant inspection station was forgotten by most Americans. With a revival of interest in ethnicity in the 1970s, Ellis Island attracted more attention, especially from the descendants of immigrants who entered the country through its doors. In the 1980s, large-scale fundraising for the restoration of the neighboring Statue of Liberty led to a similar effort to restore part of Ellis Island. In 1990, the Main Building was reopened to the public as an immigration museum under the National Park Service. Ellis Island has evolved into an iconic national monument with deep meaning for the descendants of the immigrants who arrived there, as well as a contested symbol to other Americans grappling with the realities of contemporary immigration.
While American gambling has a historical association with the lawlessness of the frontier and with the wasteful leisure practices of Southern planters, it was in large cities where American gambling first flourished as a form of mass leisure, and as a commercial enterprise of significant scale. In the urban areas of the Mid-Atlantic, the Northeast, and the upper Mid-West, for the better part of two centuries the gambling economy was deeply intertwined with municipal politics and governance, the practices of betting were a prominent feature of social life, and controversies over the presence of gambling both legal and illegal, were at the center of public debate. In New York and Chicago in particular, but also in Cleveland, Pittsburgh, Detroit, Baltimore, and Philadelphia, gambling channeled money to municipal police forces and sustained machine politics. In the eyes of reformers, gambling corrupted governance and corroded social and economic interactions. Big city gambling has changed over time, often in a manner reflecting important historical processes and transformations in economics, politics, and demographics. Yet irrespective of such change, from the onset of Northern urbanization during the 19th century, through much of the 20th century, gambling held steady as a central feature of city life and politics. From the poolrooms where recently arrived Irish New Yorkers bet on horseracing after the Civil War, to the corner stores where black and Puerto Rican New Yorkers bet on the numbers game in the 1960s, the gambling activity that covered the urban landscape produced argument and controversy, particularly with respect to drawing the line between crime and leisure, and over the question of where and to what ends the money of the gambling public should be directed.
Throughout US history, Americans have used ideas about gender to understand power, international relations, military behavior, and the conduct of war. Since Joan Wallach Scott called on scholars in 1986 to consider gender a “useful category of analysis,” historians have looked beyond traditional diplomatic and military sources and approaches to examine cultural sources, the media, and other evidence to try to understand the ideas that Americans have relied on to make sense of US involvement in the world. From casting weak nations as female to assuming that all soldiers are heterosexual males, Americans have deployed mainstream assumptions about men’s and women’s proper behavior to justify US diplomatic and military interventions in the world. State Department pamphlets describing newly independent countries in the 1950s and 1960s featured gendered imagery like the picture of a young Vietnamese woman on a bicycle that was meant to symbolize South Vietnam, a young nation in need of American guidance. Language in news reports and government cables, as well as film representations of international affairs and war, expressed gendered dichotomies such as protector and protected, home front and battlefront, strong and weak leadership, and stable and rogue states. These and other episodes illustrate how thoroughly gender shaped important dimensions about the character and the making of US foreign policy and historians’ examinations of diplomatic and military history.
Benjamin C. Montoya
A fear of foreignness shaped the immigration foreign policies of the United States up to the end of World War II. US leaders perceived nonwhite peoples of Latin America, Asia, and Europe as racially inferior, and feared that contact with them, even annexation of their territories, would invite their foreign mores, customs, and ideologies into US society. This belief in nonwhite peoples’ foreignness also influenced US immigration policy, as Washington codified laws that prohibited the immigration of nonwhite peoples to the United States, even as immigration was deemed a net gain for a US economy that was rapidly industrializing from the late 19th century to the first half of the 20th century.
Ironically, this fear of foreignness fostered an aggressive US foreign policy for many of the years under study, as US leaders feared that European intervention into Latin America, for example, would undermine the United States’ regional hegemony. The fear of foreignness that seemed to oblige the United States to shore up its national security interests vis-à-vis European empires also demanded US intervention into the internal affairs of nonwhite nations. For US leaders, fear of foreignness was a two-sided coin: European aggression was encouraged by the internal instability of nonwhite nations, and nonwhite nations were unstable—and hence ripe pickings for Europe’s empires—because their citizens were racially inferior. To forestall both of these simultaneous foreign threats, the United States increasingly embedded itself into the political and economic affairs of foreign nations.
The irony of opportunity, of territorial acquisitions as well as immigrants who fed US labor markets, and fear, of European encroachment and the racial inferiority of nonwhite peoples, lay at the root of the immigration and foreign policies of the United States up to 1945.
Between 1820 and 1924, nearly thirty-six million immigrants entered the United States. Prior to the Civil War, the vast majority of immigrants were northern and western Europeans, though the West Coast received Chinese immigration from the late 1840s onward. In mid-century, the United States received an unprecedented influx of Irish and German immigrants, who included a large number of Catholics and the poor. At the turn of the 20th century, the major senders of immigrants shifted to southern and eastern Europe, and Asians and Mexicans made up a growing portion of newcomers. Throughout the long 19th century, urban settlement remained a popular option for immigrants, and they contributed to the social, cultural, political, economic, and physical growth of the cities they resided in. Foreign-born workers also provided much-needed labor for America’s industrial development. At the same time, intense nativism emerged in cities in opposition to the presence of foreigners, who appeared to be unfit for American society, threats to Americans’ jobs, or sources of urban problems such as poverty. Anti-immigrant sentiment resulted in the introduction of state and federal laws for preventing the immigration of undesirable foreigners, such as the poor, southern and eastern Europeans, and Asians. Cities constituted an integral part of the 19th-century American immigration experience.
The United States has engaged with Indigenous nations on a government-to-government basis via federal treaties representing substantial international commitments since the origins of the republic. The first treaties sent to the Senate for ratification under the Constitution of 1789 were treaties with Indigenous nations. Treaties with Indigenous nations provided the means by which approximately one billion acres of land entered the national domain of the United States prior to 1900, at an average price of seventy-five cents per acre – the United States confiscated or claimed another billion acres of Indigenous land without compensation. Despite subsequent efforts of American federal authorities to alter these arrangements, the weight of evidence indicates that the relationship remains primarily one of a nation-to-nation association. Integration of the history of federal relations with Indigenous nations with American foreign relations history sheds important new light on the fundamental linkages between these seemingly distinct state practices from the beginnings of the American republic.
By serving travelers and commerce, roads and streets unite people and foster economic growth. But as they develop, roads and streets also disrupt old patterns, upset balances of power, and isolate some as they serve others. The consequent disagreements leave historical records documenting social struggles that might otherwise be overlooked. For long-distance travel in America before the middle of the 20th century, roads were generally poor alternatives, resorted to when superior means of travel, such as river and coastal vessels, canal boats, or railroads were unavailable. Most roads were unpaved, unmarked, and vulnerable to the effects of weather. Before the railroads, for travelers willing to pay the toll, rare turnpikes and plank roads could be much better. Even in towns, unpaved streets were common until the late 19th century, and persisted into the 20th. In the late 19th century, rapid urban growth, rural free delivery of the mails, and finally the proliferation of electric railways and bicycling contributed to growing pressure for better roads and streets. After 1910, the spread of the automobile accelerated the trend, but only with great controversy, especially in cities. Partly in response to the controversy, advocates of the automobile organized to promote state and county motor highways funded substantially by gasoline taxes; such roads were intended primarily for motor vehicles. In the 1950s, massive federal funds accelerated the trend; by then, motor vehicles were the primary transportation mode for both long and short distances. The consequences have been controversial, and alternatives have been attracting growing interest.
Irish and American histories are intertwined as a result of migration, mercantile and economic connections, and diplomatic pressures from governments and nonstate actors. The two fledgling nations were brought together by their shared histories of British colonialism, but America’s growth as an imperial power complicated any natural allegiances that were invoked across the centuries. Since the beginnings of that relationship in 1607 with the arrival of Irish migrants in America (both voluntary and forced) and the building of a transatlantic linen trade, the meaning of “Irish” has fluctuated in America, mirroring changes in both migrant patterns and international politics. The 19th century saw Ireland enter into Anglo-American diplomacy on both sides of the Atlantic, while the 20th century saw Ireland emerge from Britain’s shadow with the establishment of separate diplomatic connections between the United States and Ireland. American recognition of the newly independent Irish Free State was vital for Irish politicians on the world stage; however the Free State’s increasingly isolationist policies during the 1930s to 1950s alienated its American allies. The final decade of the century, however, brought America and Ireland (including both Northern Ireland and the Republic of Ireland) closer than ever before. Throughout their histories, the Irish diasporas—both Protestant and Catholic—in America have played vital roles as pressure groups and fundraisers. The history of American–Irish relations therefore brings together governmental and nonstate organizations and unites political, diplomatic, social, cultural, and economic histories which are still relevant today.
Jennifer M. Miller
Over the past 150 years, the United States and Japan have developed one of the United States’ most significant international relationships, marked by a potent mix of cooperation and rivalry. After a devastating war, these two states built a lasting alliance that stands at the center of US diplomacy, security, and economic policy in the Pacific and beyond. Yet this relationship is not simply the product of economic or strategic calculations. Japan has repeatedly shaped American understandings of empire, hegemony, race, democracy, and globalization, because these two states have often developed in remarkable parallel with one another. From the edges of the international order in the 1850s and 1860s, both entered a period of intense state-building at home and imperial expansion abroad in the late 19th and early 20th centuries. These imperial ambitions violently collided in the 1940s in an epic contest to determine the Pacific geopolitical order. After its victory in World War II, the United States embarked on an unprecedented occupation designed to transform Japan into a stable and internationally cooperative democracy. The two countries also forged a diplomatic and security alliance that offered crucial logistical, political, and economic support to the United States’ Cold War quest to prevent the spread of communism. In the 1970s and 1980s, Japan’s rise as the globe’s second-largest economy caused significant tension in this relationship and forced Americans to confront the changing nature of national power and economic growth in a globalizing world. However, in recent decades, rising tensions in the Asia-Pacific have served to focus this alliance on the construction of a stable trans-Pacific economic and geopolitical order.
Although the League of Nations was the first permanent organization established with the purpose of maintaining international peace, it built on the work of a series of 19th-century intergovernmental institutions. The destructiveness of World War I led American and British statesmen to champion a league as a means of maintaining postwar global order. In the United States, Woodrow Wilson followed his predecessors, Theodore Roosevelt and William Howard Taft, in advocating American membership of an international peace league, although Wilson’s vision for reforming global affairs was more radical. In Britain, public opinion had begun to coalesce in favor of a league from the outset of the war, though David Lloyd George and many of his Cabinet colleagues were initially skeptical of its benefits. However, Lloyd George was determined to establish an alliance with the United States and warmed to the league idea when Jan Christian Smuts presented a blueprint for an organization that served that end.
The creation of the League was a predominantly British and American affair. Yet Wilson was unable to convince Americans to commit themselves to membership in the new organization. The Franco-British-dominated League enjoyed some early successes. Its high point was reached when Europe was infused with the “Spirit of Locarno” in the mid-1920s and the United States played an economically crucial, if politically constrained, role in advancing Continental peace. This tenuous basis for international order collapsed as a result of the economic chaos of the early 1930s, as the League proved incapable of containing the ambitions of revisionist powers in Europe and Asia. Despite its ultimate limitations as a peacekeeping body, recent scholarship has emphasized the League’s relative successes in stabilizing new states, safeguarding minorities, managing the evolution of colonies into notionally sovereign states, and policing transnational trafficking; in doing so, it paved the way for the creation of the United Nations.
Benjamin C. Waterhouse
Political lobbying has always played a key role in American governance, but the concept of paid influence peddling has been marked by a persistent tension throughout the country’s history. On the one hand, lobbying represents a democratic process by which citizens maintain open access to government. On the other, the outsized clout of certain groups engenders corruption and perpetuates inequality. The practice of lobbying itself has reflected broader social, political, and economic changes, particularly in the scope of state power and the scale of business organization. During the Gilded Age, associational activity flourished and lobbying became increasingly the province of organized trade associations. By the early 20th century, a wide range at political reforms worked to counter the political influence of corporations. Even after the Great Depression and New Deal recast the administrative and regulatory role of the federal government, business associations remained the primary vehicle through which corporations and their designated lobbyists influenced government policy. By the 1970s, corporate lobbyists had become more effective and better organized, and trade associations spurred a broad-based political mobilization of business. Business lobbying expanded in the latter decades of the 20th century; while the number of companies with a lobbying presence leveled off in the 1980s and 1990s, the number of lobbyists per company increased steadily and corporate lobbyists grew increasingly professionalized. A series of high-profile political scandals involving lobbyists in 2005 and 2006 sparked another effort at regulation. Yet despite popular disapproval of lobbying and distaste for politicians, efforts to substantially curtail the activities of lobbyists and trade associations did not achieve significant success.
Benjamin H. Johnson
When rebels captured the border city of Juárez, Mexico, in May 1911 and forced the abdication of President Porfirio Díaz shortly thereafter, they not only overthrew the western hemisphere’s oldest regime but also inaugurated the first social revolution of the 20th century. Driven by disenchantment with an authoritarian regime that catered to foreign investment, labor exploitation, and landlessness, revolutionaries dislodged Díaz’s regime, crushed an effort to resurrect it, and then spent the rest of the decade fighting one another for control of the nation. This struggle, recognized ever since as foundational for Mexican politics and identity, also had enormous consequences for the ethnic makeup, border policing, and foreign policy of the United States. Over a million Mexicans fled north during the 1910s, perhaps tripling the country’s Mexican-descent population, most visibly in places such as Los Angeles that had become overwhelmingly Anglo-American. US forces occupied Mexican territory twice, nearly bringing the two nations to outright warfare for the first time since the US–Mexican War of 1846–1848. Moreover, revolutionary violence and radicalism transformed the ways that much of the American population and its government perceived their border with Mexico, providing a rationale for a much more highly policed border and for the increasingly brutal treatment of Mexican-descent people in the United States. The Mexican Revolution was a turning point for Mexico, the United States, and their shared border, and for all who crossed it.
The national parks of the United States have been one of the country’s most popular federal initiatives, and popular not only within the nation but across the globe. The first park was Yellowstone, established in 1872, and since then almost sixty national parks have been added, along with hundreds of monuments, protected rivers and seashores, and important historical sites as well as natural preserves. In 1916 the parks were put under the National Park Service, which has managed them primarily as scenic treasures for growing numbers of tourists. Ecologically minded scientists, however, have challenged that stewardship and called for restoration of parks to their natural conditions, defined as their ecological integrity before white Europeans intervened. The most influential voice in the history of park philosophy remains John Muir, the California naturalist and Yosemite enthusiast and himself a proto-ecologist, who saw the parks as sacred places for a modern nation, where reverence for nature and respect for science might coexist and where tourists could be educated in environmental values. As other nations have created their own park systems, similar debates have occurred. While parks may seem like a great modern idea, this idea has always been embedded in cultural and social change—and subject to struggles over what that “idea” should be.
Maureen A. Flanagan
The decades from the 1890s into the 1920s produced reform movements in the United States that resulted in significant changes to the country’s social, political, cultural, and economic institutions. The impulse for reform emanated from a pervasive sense that the country’s democratic promise was failing. Political corruption seemed endemic at all levels of government. An unregulated capitalist industrial economy exploited workers and threatened to create a serious class divide, especially as the legal system protected the rights of business over labor. Mass urbanization was shifting the country from a rural, agricultural society to an urban, industrial one characterized by poverty, disease, crime, and cultural clash. Rapid technological advancements brought new, and often frightening, changes into daily life that left many people feeling that they had little control over their lives. Movements for socialism, woman suffrage, and rights for African Americans, immigrants, and workers belied the rhetoric of the United States as a just and equal democratic society for all its members.
Responding to the challenges presented by these problems, and fearful that without substantial change the country might experience class upheaval, groups of Americans proposed undertaking significant reforms. Underlying all proposed reforms was a desire to bring more justice and equality into a society that seemed increasingly to lack these ideals. Yet there was no agreement among these groups about the exact threat that confronted the nation, the means to resolve problems, or how to implement reforms. Despite this lack of agreement, all so-called Progressive reformers were modernizers. They sought to make the country’s democratic promise a reality by confronting its flaws and seeking solutions. All Progressivisms were seeking a via media, a middle way between relying on older ideas of 19th-century liberal capitalism and the more radical proposals to reform society through either social democracy or socialism. Despite differences among Progressives, the types of Progressivisms put forth, and the successes and failures of Progressivism, this reform era raised into national discourse debates over the nature and meaning of democracy, how and for whom a democratic society should work, and what it meant to be a forward-looking society. It also led to the implementation of an activist state.
Jessica Ellen Sewell
From 1800 to 2000, cities grew enormously, and saw an expansion of public spaces to serve the varied needs of a diverse population living in ever more cramped and urban circumstances. While a wide range of commercial semipublic spaces became common in the late 19th century, parks and streets were the best examples of truly public spaces with full freedom of access. Changes in the design and management of streets, sidewalks, squares, parks, and plazas during this period reflect changing ideas about the purpose of public space and how it should be used.
Streets shifted from being used for a wide range of activities, including vending, playing games, and storing goods, to becoming increasingly specialized spaces of movement, designed and managed by the early twentieth century for automobile traffic. Sidewalks, which in the early nineteenth century were paid for and liberally used by adjacent businesses, were similarly specialized as spaces of pedestrian movement. However, the tradition of using streets and sidewalks as a space of public celebration and public speech remained strong throughout the period. During parades and protests, streets and sidewalks were temporarily remade as spaces of the performance of the public, and the daily activities of circulation and commerce were set aside.
In 1800, the main open public spaces in cities were public squares or commons, often used for militia training and public celebration. In the second half of the 19th century, these were augmented by large picturesque parks. Designed as an antidote to urbanity, these parks served the public as a place for leisure, redefining public space as a polite leisure amenity, rather than a place for people to congregate as a public. The addition of playgrounds, recreational spaces, and public plazas in the 20th century served both the physical and mental health of the public. In the late 20th century, responding to neoliberal ideas and urban fiscal crises, the ownership and management of public parks and plazas was increasingly privatized, further challenging public accessibility.