Amity - the 4-8 kids in Africa are mostly r-selected. If they did it the way the Jewish people did in the previous centuries of the smartest men having the most kids, then they would be on a good path. But we can safely assume that most smartest blacks have the least amount of kids planning a future for their offspring like most Whites and Asians and not popping them out willy-nilly while not even having enough income to feed himself.