Environmental History

During his breathtaking 19th-century scientific explorations of New Spain (as Mexico was known under Spanish rule), illustrious German scientific traveler Alexander von Humboldt crammed a lifetime of scientific studies into one extraordinary year: exhausting inspections of three major colonial silver mines, prodigious hikes to the summits of most of Mexico’s major volcanoes while taking scientific measurements and botanical samples, careful study of hitherto secret Spanish colonial archives in Mexico City, and visits to recently uncovered archaeological sites of pre-Hispanic cultures. Humboldt wrote voluminously about his Mexican experiences and is an indispensable source of insights into the colony of New Spain on the eve of its troubled birth as independent Mexico a decade later.

Coffee has played complex and diverse roles in shaping livelihoods and landscapes in Latin America. This tropical understory tree has been profitably cultivated on large estates, on peasant smallholdings, and at many scales in between. Coffee exports have fueled the economies of many parts of Latin America. At first, coffee farmers cleared and burned tropical forests to make way for their farms and increase production. Early farms benefited from the humus accumulated over centuries. In Brazil, farmers treated these tropical soils as nonrenewable resources and abandoned their farms once the soils were exhausted. In smaller coffee farms along the Cordillera—from Peru up to Mexico—coffee farming was not quite as wasteful of forests and soils. In the mid-20th century, scientific innovation in coffee farming became more widespread, especially in established coffee zones that were struggling with decreasing soil fertility, increasing soil erosion, and new diseases and pests. In the 1970s, national and international organizations promoted large-scale programs to “renovate” coffee production. These programs sought to dramatically increase productivity on coffee farms by eliminating shade, cultivating high-yielding coffee cultivars, and using chemical fertilizers and pesticides. Renovation brought tremendous gains in productivity over the short term, but at the cost of added economic and environmental vulnerability over the longer term. Since the end of the International Coffee Agreement in 1989, the global coffee market has become much more volatile. New coffee pioneer fronts are opening up in Brazil, Peru, and Honduras, while elsewhere coffee production is shrinking. NGOs and coffee farmers have promoted new forms of coffee production, especially Fair Trade and certified organic coffee. Still, most coffee farms in Latin America remain “conventional” farms, using a hybrid of modern and traditional tools. Economic and environmental sustainability remain elusive goals for many coffee farmers, and the threat is likely to increase as they grapple with the effects of climate change.

Although it has received less scholarly attention than firearms, microbes, domestic animals and plants, market economy, and statecraft, alphabetic reading and writing was crucial in the European conquest and colonization of the Americas from the late 15th century on. Unlike the agrarian empires the Spaniards encountered in the Andes and the Mexican highlands, the Portuguese frontier advanced upon tribal peoples who relied exclusively on oral language, such as the Tupi of Atlantic Brazil. These were semi-sedentary horticultural villagers whose entire socio-ecology (myths and knowledge, territoriality, subsistence strategies, etc.) was conditioned by the face-to-faceness and fugacity of spoken words. In turn, their Portuguese colonizers—for a while rivaled by the French, who enjoyed short periods of stable settlement through the early 17th century—were urban-based, oceangoing merchants, bureaucrats, soldiers, and religious missionaries whose organization strictly depended on the durability and transferability of written texts. Even if most of the Portuguese who came to Brazil in the 16th century were themselves illiterate, colonization as a social enterprise framed their actions according to prescribed roles set down in writing (both handwriting and printed script). Thus, the Portuguese colonization of Brazilian native lands and human populations can be interpreted from the point of view of the imposition of an alphabetically organized way of life. Two major dimensions of this “letterscaping” can be discerned as to its impact on Amerindian bodies (human and nonhuman) and modes of understanding. Although the 16th century was only the introductory act in that drama, its historical record shows the basic outlines of the alphabetic colonization that would play out through the early 19th century: native decimation and enslavement, territory usurpation by sesmaria grants, forest recovery in former native croplands (then resignified as “virgin forest”), loss of native ecological knowledge not recorded in writing, disempowerment of native cultural attunement to the wild soundscape, among other processes.

All of the Andean nations possess oil. Each has a unique historical relationship with petroleum, but there are also similarities between the histories of oil production in Bolivia, Ecuador, and Peru. First, oil was discovered in the countries at roughly the same time in the late 19th century when oil was gaining in global importance. Second, foreign companies came to control oil reserves in these three countries, with similar outcomes. One such outcome was the development of state oil companies so that the countries could capture more revenues from the oil deposits than they received from foreign companies. Third, many saw oil as a panacea for the region’s many social ills. Failures by oil producers, including the state oil companies, to use the oil to cure those ills has led to persistent social and political conflict. And fourth, but not finally, oil extraction in these countries has caused major struggles between indigenous people and the state since the onset of neoliberal economic schemes in the 1980s and 1990s.

There are many differences as well. The creation of state oil companies in Bolivia, Ecuador, and Peru occurred in different decades, and therefore, within different global and regional historical contexts. Only one of the countries, Ecuador, is a member of OPEC (Organization of Petroleum Exporting Countries). Bolivia has a stronger presence in regional energy distribution through its large deposits of natural gas. Peru has not turned away from the neoliberal model in the same ways that Bolivia and Ecuador have. Finally, indigenous people have had different levels of success in protecting their lands and cultures from the onslaught of oil production in the Andes. There is no question, however, that oil remains central to the development plans of each country.

From the time that Columbus arrived in the Caribbean until Spain surrendered power over its mainland American colonies in the early 19th century, Spanish and Portuguese colonial mines poured forth vast amounts of bullion, including some gold and a far greater quantity of silver, both in terms of weight and its overall value relative to gold. Fiscal records indicate that Spanish Americans officially refined gold worth approximately 374,000,000 pesos, each consisting of 272 maravedís, whereas the amount of silver produced reached a value of 3,432,000,000 pesos (to these figures need to be added contraband output, estimated to have been around 17–20 percent). In other words, the colonies refined nine times more silver than gold. While Columbus, Cortés, and other earlier explorers may have fantasized primarily about gold, it was the flood of American silver that touched off the price revolution in Europe and monetarized the emerging world economy, especially because China had a voracious appetite for silver, not gold. At the same time in the American colonies, mining distorted economic life because of the incentives the industry received from a silver-hungry monarchy. Mining also had profound consequences for indigenous society, severely exploited to provide workers for the mines and refining mills.

Colonial refiners used two methods to beneficiate their silver ores, smelting and amalgamation. Smelting was suitable for all types of American silver ores but required large amounts of fuel to heat the ovens. It remained widely used throughout Mexico during the entire colonial period. Amalgamation was a newer technology, adapted to American ores during the mid-16th century. Although it did not require large quantities of charcoal and other fuels, as smelting did, amalgamation depended on the availability of mercury. Nearly all quicksilver used in colonial Spanish American silver mining came from either Huancavelica (Peru) or Almadén (Spain), with occasional supplements from Idria (Slovenia). Whereas both smelting and amalgamation were used widely in Mexico, Andean mines relied on amalgamation.

What role did drought play in the outbreak of the Mexican Revolution of 1910? Although historians of the Mexican Revolution acknowledge that the effects of drought helped catalyze it, they have not explored in any depth what connects drought to revolution. Instead, they usually subsume it within a more general discussion of agricultural cycles to explain the conduct and fortunes of popular revolutionary armies. In particular, they reference the onset of drought between 1907 and 1909 as exacerbating an economic downturn induced by severe recession in the United States. By then, Mexico had become economically integrated with its northern neighbor through rapidly growing foreign investment, trade, and cross-border migration facilitated by the railroad transportation revolution. These socioeconomic and ecological factors together led to steep declines in wages and earnings, devastating crop failures, spikes in food prices (principally corn and beans), and even famine in the lower and middle classes.

Although suggestive, such passing references to drought in the historiography of the revolution do not furnish a clear picture of its effects and how they may have contributed to social and political conflict. In the 21st century, new technologies, methods, and sources—from historical meteorological reports and climate-related accounts gleaned from archival sources to modern historical climatological data reconstructions—facilitate doing more rigorous climate history. This article provides a sampling of these methods and sources on the role of drought in late 19th- and early 20th-century Mexico that can supplement, elucidate, and even revise our understanding of the origins of the Mexican Revolution.

From the moment the expedition of Magellan gave Patagonia its name, it became a land where European fantasies and fears dwelled. A no man’s land inhabited by giant anthropophagites located at the antipodes of civilization, this steppe swept by icy winds was not transformed into a colonial setting until the 19th century. The territory then became the object of an ongoing territorial dispute between the new states of Argentina and Chile, whose efforts to establish sovereignty as landowners languished until the late 1870s. Nomadic indigenous sovereignties had faced slow Western expansion on the continent; here, they were swiftly replaced by sheep. On the continent, the Tehuelche were displaced; on the island of Tierra del Fuego, the Selknam faced extermination. Sheep sovereignty, fully integrated into imperial networks, was the driving force behind local state building. Just as the British pastoral colonization of the Falkland Islands conditioned any possibility of permanent presence in the South Atlantic, the sheep industry, arriving swiftly in the shape of capital, persons, and animals, allowed for the Argentinization and Chileanization of what was once the frontier of civilization. In this sense, the occupation of the Falklands/Malvinas, Patagonia, and Tierra del Fuego may be considered successive colonial processes that form part of the same frontier drive as the Empire in capital.

Between 1796 and 1809, an array of pro- and anti-mining discourses unfolded in response to a proposal to mine gold in the former Jesuit mission territories of Chiquitos. In the last years of the 18th and the beginning of the 19th centuries, Chiquitos, in addition to being a region formerly known for its network of Jesuit missions, was a frontier of colonial settlement on a transimperial boundary characterized by an ambiguous jurisdictional status. These geographical particularities molded in significant ways the arguments presented by supporters as well as detractors of gold mining. Whether they inclined to the negative or positive, colonial discourses relating to mines and mineral extraction were tethered to geography and shaped in relation to ideas and beliefs about the characteristics of particular territories.

Before there was Mexico, there was oil. Millennia of organic matter that collapsed and liquefied into fossil fuel rested deep underground and underwater along the half-moon territorial formation that 19th-century geographers named the Mexican Gulf. Hidden by the lush tropical rainforests, marshes, and mangroves that occupied the landscape from the Pánuco River on the border between modern day Tamaulipas and Veracruz and the Bay of Campeche on the South, the oil seeped to the surface in small ponds, sometimes blackening the waters of streams and lagoons from Tabasco to the Huasteca. The human communities who inhabited that part of the globe thousands of years later knew about and utilized nature’s oozing sticky black tar.

The Olmec, who flourished in southern Veracruz from 1200 to 400 bce, collected the viscous liquid. They used it to seal canoes and aqueducts, to paint and decorate clay figurines and knife handles, to pave the floors of their homes, and to glue materials. There is evidence they boiled and cooked the petroleum for better usage, a process that would become known as refining in the 19th century. At the northern end of the rainforest, the region called the Huasteca, the Teenek also gathered the syrupy fluid from its natural springs into the 15th century and used it in ways similar to the Olmec of yesteryear: as sealant for canoes, paint for pottery, perfume, gum for chewing and teeth cleaning, illuminant for torches, and aromatic incense for religious ceremonies. Yet it was the Aztec who gave petroleum the native name that survives to this day, chapopote, the hispanicized version of tzaucpopochtli, meaning fragrant (popochtli) glue (tzauctli). As humans did globally, those who lived with chapopoteras utilized what nature created and transformed it according to their cultural needs and inventions. There is no evidence that anyone living along the coastal range of the Gulf of Mexico in the pre-Columbian era went beyond collecting the oil that percolated from the subsoil naturally. In other words, there is no evidence of extraction of petroleum by indigenous people. Oil extraction, and its environmental consequences, is a 20th-century story, layered over a 15th-century ecological revolution.

Urbanization and environmental change have worked in tandem over the course of Mexican history. Hinterland production, the establishment of market economies, and the intensive transformation of nature have fueled urban growth. The concentration of capital and expertise in cities has, in turn, enabled urban elites to rework the urban environment by creating industrial centers, executing technical-heavy infrastructure, building new subdivisions, and regulating hygiene. From the beaches of Cancún and the air and water pollution of Tijuana’s industrial parks to the prolific silver mines of Zacatecas and the henequen monoculture surrounding Mérida, Yucatán, rapid urban growth and profound changes to the environment within and outside cities have depended on and intersected with each other.