Slavery was not caused by the whites. The enslavers were black. They were a superior force to the enslaved that were inferior. Rather than sell them to African buyers, they sold them to Europeans probably at a much better price.
Then there is James Monroe, President of the United States. During his time, a black African state was established as a home for those enslaved in America. It still exists and the name is Liberia,its capital is Monrovia.
Look, I saw Roots on TV (just replayed the holiday weekend)
The white men set-up and captured them in nets in Africa, just like what the Apes did to humans in Planet of the Apes (1968).
They cant put it on TV if its not true can they?