The Columbian Exchange and the Reversal of Fortune.

It is difficult to think about modern American food without including hamburgers and hotdogs. It is also difficult to think about popular American history without cowboys mounted on horseback tending herds of cattle. However, before the arrival of Columbus in 1492 there were no cattle or pigs in America to provide beef and pork for hamburgers and hotdogs. There was no wheat to make hamburger and hotdog buns. There were no horses for cowboys or Indians to ride. The European settlers brought with them cattle, pigs, horses, wheat, and many other plants and animals that became the foundation for modern food and agriculture in the Western Hemisphere. It is also difficult to think about modern Mexican food without including rice, tacos filled with meat, ferried beans in animal fat, cheese in enchiladas, and sugar, cinnamon, and milk in chocolate. However, Mexico in 1492 had none of these ingredients. The massive transplantation of plants and animals across the Atlantic Ocean in both directions has been called the Columbian Exchange (Crosby 1972). It has been described as the "greatest human intervention in nature since the invention of agriculture (Fernandez-Armesto 2002: 165), and it has had an enormous effect on the Americas and the entire world. The Columbian Exchange altered the kind of food Americans and Mexicans eat, the kind of agricultural products produced in both countries, and the entire pattern of world economic growth.