Well, the East-Asian variant of the EDAR gene seems to have been strongly selected for: https://www.nytimes.com/2013/02/15/science/studying-recent-human-evoluti

Well, the East-Asian variant of the EDAR gene seems to have been strongly selected for: https://www.nytimes.com/2013/02/15/science/studying-recent-human-evolution-at-the-genetic-level.html https://www.nytimes.com/2013/02/15/science/studying-recent-h... Like most genes, it affects all sorts of systems at once, so pinning down which of its changes from the ancestral type are most responsible for the selection is a very difficult problem. Empirically it has clearly been a successful variant, though.