Perhaps I'm wrong, but both your article and your response here smell of the "woke" Social Justice Warrior ideology that has rotted out the world's universities. So I did a quick search to see what evidence I could find for your claims about Wilberforce. What I found instead was that he argued against the idea of Negro inferiority. I think your points about the sexual aspect of Southern slavery are important, and would be even more valuable without all the SJW ideology. https://www.jstor.org/stable/2708515