India
It's India because they needed vast caste system.
It transported livestock, crops, and diseases among Africa, Europe, Asia, and the Americas.
The Columbian Exchange was the exchange of items which began during the period of exploration in the 15th century.
The Columbian Exchange moved crops from the Old World to the New World and vice versa. Tomatoes, potatoes, corn, and pumpkin were all transferred to Europe becoming staple food crops for many countries. Europeans brought disease, domesticated animals, rice, onions, and sugarcane to the Americas. Africa was introduced to new foods and manufactured items in exchange for slaves to work plantations in the New World.
In some ways, we can take as evidence the fact that almost everyone in the western world now condemns the Holocaust, meaning that we have similarities that go beyond race, culture, and nationality.
It makes them have a house to live in instead of being homeless
