Alright, so last but not least, the Columbian Exchange involved the transfer of lots of people. Again, in the early stages, this movement was mostly one-way, with Europeans and Africans, the Africans usually against their will, making their way to the Americas. So the Columbian Exchange led to the repopulation of the New World following the disease devastation of the initial encounter, and better nutrition allowed the population of the Old World to grow, which in turn placed population pressure on Eurasia, which led to more people coming to the Americas. In the process, the world's human inhabitants became more genetically and ethnically interconnected, but it also led to the horrors of Atlantic slavery, which we'll be discussing next week. What are we to make of the Columbian Exchange? It devastated the population of the Americas, it led to the widespread slavery of Africans, but it also allowed for a worldwide population increase, and the lives of some natives, including Plains tribes like the Lakota, became better and more secure, at least for a while. Fewer people have starved since the Columbian Exchange began, but the diversity of life on Earth has diminished dramatically, and planting crops where they don't belong has hurt the environment.