That was three years later. The abundance of meat and plentiful land for agriculture and grazing meant that Europeans in the Americas very rarely experienced famine, and despite what you may have learned about religious and political freedom, the main reason Europeans came to America was to eat. Large European animals also changed the nature of work in the Americas. Before Europeans, the largest beast of burden was the llama, and at best it could carry like a hundred pounds. This meant that for the long distance travel that the Inca engaged in, the primary transportation animal was Incas. Oxen, when combined with their plows, made it possible to bring more land under cultivation and also made transportation easier and more efficient, and plus European animals remade culture. The grossly stereotypical American Indian, like from the movies, riding the Great Plains with an eagle feather headdress and war paint, well he didn't exist before the Columbian Exchange because there were no horses for him to ride.