Pulque, the alcoholic beverage of pre-Columbian highland Mesoamerica is the fermented derivative of aguamiel, the juice or sap of the agave known as agave pulquero—principally Agave salmiana. Aguamiel is a sweet, somewhat heavy juice that collects in a scraped out basin in the heart of the agave pulquero and, unless refrigerated, rapidly ferments into the alcoholic pulque. The agents of fermentation are ambient and plant-colonizing bacteria and yeasts. Fresh pulque is a frothy, cloudy brew with a slightly sour taste, usually containing around 2 percent alcohol or somewhat higher, meaning it can be drunk in large quantities without intoxicating the imbiber. Although it is a nutritious drink, consumption was condemned by Spaniards in varying degrees during the Colonial Period. Its popularity in contemporary southern Mexico is increasing after more than a century of persecution and public disparagement. Pulque figures prominently in pre- and post-Columbian Mesoamerican history.
Production of tequila and mezcal is completely different from production of pulque. The former are distilled from the pressed juice (tepache) of macerated and roasted hearts of certain agaves. The juice is fermented in vats for several days, then heated in a still, evaporated, and condensed. Tequila, by law is made from A. tequilana, and mezcal by custom is made primarily from A. angustifolia. Both these distillates contain about 40 percent alcohol. Pulque is a naturally occurring product consumed by native peoples for at least two millennia. Tequila and mezcal are industrial products derived from processes introduced into the Americas by Europeans.
U.S. foreign policy toward Latin America in the 19th century initially focused on excluding or limiting the military and economic influence of European powers, territorial expansion, and encouraging American commerce. These objectives were expressed in the No Transfer Principle (1811) and the Monroe Doctrine (1823). American policy was unilateralist (not isolationist); it gradually became more aggressive and interventionist as the idea of Manifest Destiny contributed to wars and military conflicts against indigenous peoples, France, Britain, Spain, and Mexico in the Western Hemisphere. Expansionist sentiments and U.S. domestic politics inspired annexationist impulses and filibuster expeditions to Mexico, Cuba, and parts of Central America. Civil war in the United States put a temporary halt to interventionism and imperial dreams in Latin America. From the 1870s until the end of the century, U.S. policy intensified efforts to establish political and military hegemony in the Western Hemisphere, including periodic naval interventions in the Caribbean and Central America, reaching even to Brazil in the 1890s. By the end of the century Secretary of State Richard Olney added the Olney Corollary to the Monroe Doctrine (“Today the United States is practically sovereign on this continent and its fiat is law upon the subjects to which it confines its interposition . . .”), and President Theodore Roosevelt contributed his own corollary in 1904 (“in the Western Hemisphere the adherence of the United States to the Monroe Doctrine may force the United States, however reluctantly, in flagrant cases of wrongdoing or impotence, to exercise an international police power”). American policy toward Latin America, at the turn of the century, explicitly justified unilateral intervention, military occupation, and transformation of sovereign states into political and economic protectorates in order to defend U.S. economic interests and an expanding concept of national security.