> I wonder if our genetic memory has some distant memory of a dark race
Only replying because nice digits. And this is not politically correct, but:
One theory is that the three sons of Noah were the originators of the three major genetic lines: Caucasoid, Mongoloid, and Negroid.
Because of Ham's sin (some believe Ham had gay sex with Noah when Noah was drunk, and some also think Ham had sex with his own mother), Noah cursed Ham's offspring (Canaan) and gave him the name which means “humiliated.”
Part of the curse may have been black skin, and another part was dooming his line to servitude (slavery?)
<Cursed be Canaan; A servant of servants He shall be… Genesis 9:25
Not a Bible scholar though, and probably other anons can refute or expand on this.