The independent spirit of the city was given a tremendous boost in 1806 and 1807, when local militia forces fought off two attempted invasions by British troops. Neither invasion was a major effort, but the fact that local forces had defeated a British army marked the initial episode in the history of Argentine nationalism. In 1808, when Napoleon invaded Spain and placed his brother Joseph Bonaparte on the throne in Madrid, many porteños, like people throughout the empire, reconsidered their ties to the crown. In May 1810 the town council severed ties with Spain and the viceregal government, and on May 25 it declared allegiance to a new ruling junta.

The events of the next decade emphasized the split between the city and the rest of the region. Few residents of the interior were disposed to follow the lead of Buenos Aires, and it was not until 1816, at a congress in Tucumán, that the other provinces declared their independence. A provisional government was created, and Buenos Aires was named capital of the United Provinces of the Río de la Plata. The more distant provinces of the former viceroyalty—Bolivia, Uruguay, and Paraguay—refused to become part of a new country dominated by the port city, however. For nearly 30 years the provinces were held together by federalism, which meant virtual autonomy for each province. (The city of Buenos Aires exercised whatever central authority existed in the new country; the interior provinces were allowed to go their own way.)

Ironically, it was the interior provinces that suffered most from this arrangement, and in 1851 they mounted a coalition that attempted to change the balance of power by force. They succeeded in ousting the porteño dictator, Juan Manuel de Rosas, but were unable to reorganize the country in an effective manner. A decade later, the porteños, under the leadership of Bartolomé Mitre, defeated the military forces of the interior and established a strong government centered in Buenos Aires. This development was recognized officially when the city was made the federal capital in 1880. (The political boundaries of the modern state did not become firmly established until well into the 20th century, with several minor disagreements over the boundary with Chile still extant.)

The political struggles between the porteños and the interior became more intense after 1850 because the stakes became greater. Dramatic changes in the European market as a result of industrialization and the transformation of capitalism, together with significant advances in technology, made exploitation of the fertile plains of Argentina economically viable. All that was required was the labor to work the land and the capital to pay for the transportation of products to the ports. For the most part, the capital came from Britain. The bulk of the labor came from Spain and Italy. In little more than a generation the land was transformed. By the beginning of World War I, Argentina had become one of the world’s principal exporters of agricultural products.

The economic change in the countryside led to three fundamental changes in the character of the city. First, the population changed. Immigrants who had been attracted to the country with the hope of settling on the land found it impossible to buy land, and they migrated back to the city. At the same time, the need for new port facilities and service activities that were related to increasing exports created a demand for labor. Those newcomers, mainly from Spain and Italy but also from eastern Europe and Germany, jammed into the older houses on the south side of the city, pushing the middle-class residents north across Avenida de Mayo. Because many jobs were in the port and in the slaughterhouses on the outskirts of the city, the newcomers also pushed south across the Riachuelo into adjoining counties.

The second significant change in the city was the massive amount of wealth that came into the hands of individuals and to the state. The former built great mansions, modeled after French châteaus. These mansions today house government ministries or the embassies of foreign governments. At the time, they were an international symbol of vast wealth. In Paris at the turn of the century, a common phrase was “to be as rich as an Argentine.” These mansions were constructed in Barrio Norte, many around Plaza San Martín, at the northern end of Calle Florida, or close to Avenida Santa Fe.

The third major transformation was in the physical layout of the city. The owners of the mansions, members of the ruling elite, decided that they would transform Buenos Aires into the Paris of South America. As part of the preparations for the May 1910 celebration of the centennial of the first declaration of independence, the city council decided to build a subway system and a network of broad avenues radiating out from the city center, in frank imitation of the urban reforms imposed on Paris by Napoleon III and made famous by Georges-Eugène Haussmann. The “Haussmannization” of Buenos Aires called for the construction of broad avenues every four blocks, running east and west, and every 10 blocks, running north and south, and for construction of what would be claimed as the broadest avenue in the world, patterned on the Champs-Élysées. Named 9 de Julio (July 9) after the official national day of independence, that block-wide swath was cut through the city in the 1930s and opened officially in October 1937.

The infrastructure put into place in the years before World War I endures to the present. The broad avenues in the core of the city, most of them carved out during the 1920s and ’30s, continue to carry the burden of vehicular traffic and only two of the five subway lines were built after World War II.

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The modern city

Since the mid-20th century, three important developments have affected the character of the city. The first was the virtual halting of international immigration after 1930. The demand for labor in the metropolitan area was met thereafter, in large measure, by migrants from the interior—Argentinians of mestizo (mixed Indigenous and European) ancestry, whose presence led to conflicts with the porteños. These people came from northwestern Argentina or from the neighboring countries of Uruguay, Paraguay, and Bolivia.

The second development stemmed from the movement of the mestizos, who, finding the inner city slums too crowded, settled on unoccupied land in the suburbs near the manufacturing establishments that provided many jobs. Their dwellings, generally made of corrugated metal, were part of the first shantytowns, or villas miserias (“neighborhoods of misery”), to appear in the Buenos Aires metropolitan area. The ethnic differences of these newer migrants to the city added a nuance of bitterness to the social conflicts that characterized the development of industrial capitalism in the metropolitan area in the 1930s, ’40s, and ’50s. Many of the newcomers would become staunch followers of the populist leader Juan Perón, who came to power in a military coup in 1943 and served as president from 1946 to 1955 and again from 1973 until his death in 1974.

The third important development in the second half of the century was the replacement of the tramway and train by the automobile and the colectivo, or microbus, as the dominant modes of transportation in the city. Unlike many other large Western cities, Buenos Aires is not yet ringed by a network of superhighways. A complete network was planned after World War II, but economic and political difficulties have prevented its construction. By the beginning of the 21st century, the existing network of streets was saturated with vehicular traffic, and the need to improve other modes of transportation seemed imperative as traffic jams and gridlock added to the more frustrating characteristics of contemporary Buenos Aires.

Joseph S. Tulchin

During the Guerra Sucia (“Dirty War”) the military regime that controlled Argentina from 1976 until 1983 covertly tortured and killed several thousand civilians in an attempt to purge the country of alleged left-wing radicals; one group in Buenos Aires—the Grandmothers and Mothers of the Plaza de Mayo —called attention to the fates of their family members and other desaparecidos (“disappeared persons”) by holding weekly vigils on the square fronting the Casa Rosada.

In the early 2000s Buenos Aires was greatly affected by Argentina’s faltering economy. In 2001 the country suffered a massive economic collapse after defaulting on its foreign debt payment. Inflation increased by 50 percent, and the unemployment rate in Buenos Aires reached an all-time high. Porteños with savings accounts or investments lost significant amounts of money. Social services were cut, and pension payments were delayed. Violent protests occurred in the city streets as porteños and others demonstrated their dissatisfaction with the government’s handling of the economy.

By 2004 Buenos Aires had recovered from the crisis, and its economy was booming again. But the city still experienced the challenges of modern urban life. Buenos Aires’s new underclass, its most recent migrants, who have crowded into shantytowns, are disproportionately undereducated and have not been easily absorbed in the service-oriented economy. Although the national and local governments have dedicated significant resources to trying to close the ever-widening gap between the privileged and the underclass, they have had little success in helping the newcomers raise their standard of living. Moreover, the cost of living in Buenos Aires is among the highest in Latin America, and about one-fourth of the population in the metropolitan area lives in poverty. Crimes such as pickpocketing, mugging, sexual assault, and car theft are major concerns throughout the area, but the well-trafficked city center has remained the safest part of Buenos Aires. In 2007 and 2008 power shortages in the city were indicative of a broader infrastructure problem, and the city experienced periods of high inflation.

Despite these numerous obstacles at the beginning of the 21st century, Buenos Aires exhibited signs of social improvement and a burgeoning economy, especially in response to developments in technology and the city’s increasing globalization. Internet cafés have proliferated since the 1990s, demonstrating the city’s growing electronic connectivity to the rest of the world. Moreover, Buenos Aires has remained the cultural heart of Argentina, shaping much of the country’s identity through education, art, publishing, and locally produced television shows, advertising, radio programs, and movies.

David J. Keeling