I think west african blacks have some advantage in the 100 meter.I believe in caste in a lot of sports, the most in sports were you need scouts.I think blacks have on avarage a bit better top speed and give them their credit,( it would be cool if others give whites the credit for strength, shot put etc.) and top speed is not only important from like 30-70 meters but also the end part of your acceleration and of course also in deceleration pace, 70-100 meters because deceleration pace is just topspeed minus for most sprinters only a very slightly speed. I think Usain bolt's 9.58 is as rare as a white running 9.89 or so.Maybe Lemaitre can it in the future.That a lot of whites think or know that blacks have abit advatage at sprinting made the difference maybe a little bigger so the genitically 0.3 became 0.4 or so. White tribes did always mixed much more then others did.This is why in dna europeans have genes of all white tribes in their dna, and that you see nordic looking europeans, meditteranic looking ones all over europe, of course most nordic in the north and most meditteranice genes in the south, most celtic and Iberian in the west and most Slavic in the east.I tink maybe the mixcing of white tribes made as good at decathlon( i think from all white tribes are you can say they have on average good strength), all around athletes but maybe this is why blacks can be from 1 to 10 often 8.5 fro speed and 7 for endurance and whites 8 for speed and 8 for endurance and east african have good endurance but are less then blacks and maybe whites in the 100 meter. maybe i am wrong but this is how i think about it.