Not "Black", but the Muslims were really good with technology up until about 1200AD. We still use their system of numbers today and have inherited some financial practices from them. The reason they aren't more successful *today* can probably be attributed to problems with the Islamic theology of Science, Mongolian conquest, and yes Western war mongering. Asians were actually at least on par with the Western world up until the early modern era( maybe 1600AD ? ). Why Europeans passed the Asians in terms of development isn't really obvious. It was likely a combination of political problems, a culture less interested in abstractions, less free economics, and theology that was less open to science as Christian theology. Africans? Don't really know. With all races, genes can never actually be a complete answer to describe their differentiation because you need to explain why the genes started to divulge in the first place, when there was a common ancestor. The collective behavior, habits, adaptions of thousands of years seem to be embedded in genes, but what first caused those adaptions to take place? Ultimately, the cause of genetic differentiation must be with something other than genes, although randomness in gene selection is a possibility.