There wasn't really any specific person. The people who fostered slavery were people who needed people to reliably do work, so they bought people to do it, which probably led to the growth of a human trafficking industry to meet the demand.
There was no slavery in Africa before the Europeans got involved!
Not just America was involved in slavery. There was England, America, and, obviously Africa. They traded slaves and goods in what is called the Triangle Trade. (If you don't know what that is, Google it.) They were all involved in slavery for money and goods to be imported to their country.
Slavery is an outrage that violates the human rights of those involved in it.
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The Portuguese and the Spanish
egypt
the west Africa used to sell their people into slavery to get guns the leader were involved and they neglected agriculture
Spain was least involved in the slave trade.
African Americans
Debt bondage is a form of modern day slavery.
the liberator
the southern States (FL,GANC SC and others)All the states were. The North did most of the trading and money making while the south actually put the slaves to work.