Interesting paper about the black slave merchants
http://jamaica-gleaner.com/article/focus/20151025/africas-role-slavery
"The great early 20th-Century black writer of the Harlem Renaissance, Zora Neale Hurston, bitterly complained that "the white people held my people in slavery here in America. They had bought us, it is true, and exploited us.
But the inescapable fact that stuck in my craw was: My people had sold me ... . My own people had exterminated whole nations and torn families apart for a profit before the strangers got their chance at a cut. It was a sobering thought. It impressed upon me the universal nature of greed." And we might add, the universal nature of slavery."
(Btw Another person realizing the truth of the sinful fallen state of man)