Following this logic for what it is worth, is it necessarily slavery that is responsible or the relatively underdeveloped nature of the African continent? I freely admit I may well be somewhat ignorant, but the way Africa is usually portrayed is that it has for the most part lagged behind Europe, the Middle East, and Asia in technological development which led to potentially harsher living conditions there. Could it be that those who live in Africa are simply more, for lack of a better word, athletic, because those more prone to disease or weakness would have a tendency to die off in the more brutal African climate with fewer amenities for healing and fewer tools for making work easier? Or am I completely off base and just buying into a Eurocentric view of history perpetuated by popular culture?