Again, the topic of this essay is about the Atlantic slave trade, which was not taking place until Europeans got involved. This is not meant to be a general study of slavery in Africa, but a look at a particular aspect of the Atlantic slave trade.
Also, did you bother to read the article because I clearly mentioned in the article that Africans did not have the capacity to make voyages to the Americas and that many Africans didn’t even know about the Americas, but you are repeating that information as if you are trying to inform me. Also, I have actually written a chapter in one of my books dealing with the Arab slave trade in Africa. Did you bother to read that book or are you trying to draw conclusions about me based on this single article?