The evolutionary history of vertebrate nonhuman animals such as mammals in what is now Latin America extends back tens of millions of years. Given that anatomically modern humans first appeared in Africa a mere 200,000 years ago and would not reach Latin America until some 12,000 years ago, nonhuman animals in the region evolved for most of their history without interference from human activities. Once they appeared, humans began to shape the history of the region’s animals in profound ways. In fact, one could argue that animal history in Latin America has been a story of increasing human impact; from the Paleo-Indians, who may have driven countless species of megafauna to extinction; to the agrarian societies that domesticated species such as dogs, turkeys, and llamas (or tolerated the animals’ self-domestication); to the radical transformations brought about by the Columbian Exchange; to the industrialization process of the last two centuries. But animal history in the region is also marked by adaptation and agency on the part of animals, who have influenced the course of human history. This dynamic and adaptive human–animal relationship has been pushed to the limit during extinction pulses, manifest in the currently accelerating biodiversity crisis. Environmental history makes the convincing case that any historical account that neglects the environment offers an inaccurate depiction of the past. By the same token, animal historians suggest that a more complete understanding of history requires redefining its boundaries to include the often underappreciated story of nonhuman species and their interrelationships with human societies.
Gregory T. Cushman
Agrarian societies in Latin America and the Caribbean have accomplished some of the most important and influential innovations in agricultural knowledge and practice in world history—both ancient and modern. These enabled indigenous civilizations in Mesoamerica and the Andes to attain some of the highest population densities and levels of cultural accomplishment of the premodern world. During the colonial era, produce from the region’s haciendas, plantations, and smallholdings provided an essential ecological underpinning for the development of the world’s first truly global networks of trade. From the 18th to the early 20th century, the transnational activities of agricultural improvers helped turn the region into one of the world’s primary exporters of agricultural commodities. This was one of the most tangible outcomes of the Enlightenment and early state-building efforts in the hemisphere. During the second half of the 20th century, the region provided a prime testing ground for input-intensive farming practices associated with the Green Revolution, which developed in close relation with import-substituting industrialization and technocratic forms of governance. The ability of farmers and ranchers to intensify production from the land using new cultivars, technologies, and techniques was critical to all of these accomplishments, but often occurred at the cost of irreversible environmental transformation and violent social conflict. Manure was often central to these histories of intensification because of its importance to the cycling of nutrients. The history of the extraction and use of guano as a fertilizer profoundly shaped the globalization of input-intensive agricultural practices around the globe, and exemplifies often-overlooked connectivities reaching across regional boundaries and between terrestrial and aquatic environments.
The years immediately following World War II constituted a watershed in Mexico’s political development: the national government, controlled by the recently renamed Institutional Revolutionary Party (PRI) and led by a new generation of civilian professional politicians, made rapid industrialization its top priority. In a matter of decades, the nation transformed from a predominantly rural to an ever more urbanized society. Significant social and cultural changes followed. The middle classes became the dominant voice in national politics and the beneficiaries of the government’s economic policies, while earlier efforts designed to ameliorate the suffering of the majority were suspended or even reversed, leaving urban workers and the rural poor to wonder what had happened to their revolution. Gradually, a consumerist culture eclipsed the cultural revolution of the 1920s and 1930s. Despite official claims to the contrary, Mexico in this era shed its revolutionary identity and replaced it with a modernizing zeal. Through the 1960s, scholarly assessments regarded the nation as a model of Third World development. In the estimation of foreign and domestic observers alike, the combination of aggressive capitalist development, state protectionism, and foreign investment had created an economic miracle, while the 1910 Revolution had produced a relatively benign, paternalistic form of “soft” authoritarianism. But in the years following the devastating massacre of students in 1968 at the Plaza de Tlatelolco just days before the Mexico City Summer Olympics, scholarly assessments soured. In the coming decades, more and more evidence of political violence, media manipulation, and official corruption would surface, leading to a crisis of political legitimacy that would be severely aggravated by economic crisis in 1982. For these reasons, the period from 1946 to 1982 is a distinct and important chapter in the nation’s 20th-century development.