I was not necessarily arguing against mixbreeds, more was I arguing against your understanding of genetics, and those studies did not adequately compare Old World breeds to New World ones. There is a discernible difference. I personally think race-mixing could work, depending on the parent. While on average, mixing dogs might produce okay results, but I'd argue it isn't so for humans. Also, I should make it clear that we once created a new mixed breed on accident (female dog broke into male dogs area). The puppies they made were physically superior, but they were fucking stupid and acted like they were hyped up goofballs, and their coats/skin were jacked up.