Earlier quoted context omitted.
Ok, so if "race" only affects external appearance, explain why every single london marathon champion since 2002 is kenyan or ethiopian?
There's no consensus as to the answer to that question. But even if we accept the genetic accounts offered, the explanation would be that certain Ethiopian and Kenyan tribes living in mountainous areas have adapted to living at high altitudes by adapting to increase the efficiency of their oxygen uptake, which, in turn, makes them better long-distance runners. That has nothing to do with melanin, or even with being K…
Do you then admit that tribes can adapt cognitively depending on their environment? Or does adaptation only occur below the neck?