After Europeans reached the Americas in the late 15th c., the world experienced an unprecedented movement of plants, animals, and culinary traditions, often called the Columbian Exchange. This global circulation reshaped diets, economies, and environments on every continent. From the Americas came crops that later became staples of world food security, such as maize, potatoes, tomatoes, cacao, peanuts, beans, cassava, pineapple, sweet potato, peppers, papaya, and avocado, as well as tobacco, rubber, and many tropical fruits.

In return, Europe contributed lettuce, grapes, pears, oats, pigs, cattle, horses, chickens, and culinary herbs like rosemary, thyme, and parsley, along with other vegetables and fruits. Asia supplied sugarcane, rice, wheat, tea, citrus fruits, mangoes, spices such as cloves and cinnamon, and plants like cotton and soy, while Africa provided products such as coffee, melon, watermelon, and tamarind through complex routes. Together, these exchanges created new cuisines, transformed landscapes, and bound distant regions into a single, interdependent world.

The Americas contributed crops that transformed global diets: maize, potatoes, tomatoes, cacao, avocados, peppers, papaya, pineapple, peanuts, beans, cassava, vanilla, and many tropical fruits. Europe introduced livestock (cattle, pigs, chickens), grains (wheat, barley, oats), fruit trees (grape, pear, fig), and numerous herbs and vegetables such as lettuce, celery, garlic, radish, artichoke, asparagus, and peas. Asia brought sugarcane, rice, citrus, tea, mango, onion, spices (clove, cinnamon, ginger), legumes (lentils, soy), and key fruit and nut trees. Africa contributed coffee, melon, watermelon, and tamarind through historic Mediterranean and Atlantic routes.

In the colonial period, gaining access to privileges, honors, public office, certain professions, or admission to educational institutions required a legal procedure known as a probanza de limpieza de sangre—a certification of purity of blood. Applicants had to prove they had no Jewish, Moorish, Black, or Indigenous ancestry, categories then labeled as bad blood. This strict divide between whites and others did not vanish after Independence; it continued in political and scientific discourses that analyzed the racial composition of the new republic and claimed the supposed inferiority of Indigenous and Afro-descendant peoples. Over time, these ideas took root and still echo today in everyday language and political rhetoric.