The point though is that whether Europeans did this more than Africans is unknown and how much this type of eugenics contributed to Europeans. Rather, the environment whites had to evolve to survive in makes much more sense to explain in whole the discrepancy with sub-Saharans. They would have also kept those in the tribe with traits better suited to the environment. In this case, such a thing could potentially be detrimental to sub-Saharans in the long term since their form of eugenics selected for fast runners more than intelligence in the short term.

This, in part, has shaped modern Europeans in the way we know them (and other peoples who created complex civilizations like Europeans).

Although you're also perhaps right because even Mali was a complex civilization.