Africa in an Age of Transition. The Slave trade. Slavery had been practiced in Africa since ancient times The primary market for African slaves was Southwest Asia, where most slaves were used as domestic servants.
Demand for slavery increased in the discovery of the Americas in the 1490s and planting of sugarcane.
275,000 slaves exported during the sixteenth century, 2,000 to the Americas every year
King Alfonso of Congo said, “so great is the corruption that our country is being completely depopulated.”