Strayer, Chapter 15 (pp.449-458)

The being of human slaves began in North and South America, in which they took over two million slaves and sent them to the Americas. In  a lot of countries it was a norm for people to own and sell slaves on day to day bases. Africans, were the main minority group that were captured on their land and sent to other countries, mostly European lands, to become slaves. During the slave trade Americas population decreased slowed down the growth of Africa. In this time the Chinese and European reigns were growing. During the modern era slavery has become less of a norm and people excepted the fact that slavery wasn't the right answer.