In the study conducted in the 1950s, social psychologist Leon Festinger and colleagues established their proximity theory, which states that individuals tend to forge friendships with those who live close to them. People who are close by, have more chances to develop a strong interpersonal relationship rather than those who live far away from each other. Probably, this is due to how frequently people can meet.
Africans were deemed suitable for work in the Americas because they were unfamiliar with the land and so less likely to escape, largely resistant to European diseases, accustomed to laboring in the tropics, and came from farming cultures.
