What Are The Causes Of African Slave Trade In 1451-1870

The leading cause of the African slave trade in the 1451 - 1870 centuries was that Europe profited from the exploitation of the slave which were used as free labor in the Americas in order to produce cheap materials for manufacturing goods. Slavery was used by the Portuguese, the Spanish, and the English in the years 1451 through the year 1870. Slavery was used for many reasons but some of those reasons are racism, religion, save money. The slaves were people from africa that we brought to america, and all three Americas used Africans as slaves. But all of the Americans treated their slaves differently, in North America if you were born by a slave you became a slave and it was possible to earn your freedom but not likely.