I know, right? I just tried to talk to someone in he steemit chats yesterday who believes human beings are biologically more inclined to group together by race and that there is something unnatural about "interbreeding". He cited evidence that seemed pretty fallible to me but it had some scientists names on it andserved him well in makin his arguments. I wish I had this article, I was trying to express a very similar sentiment but this was written better!