The idea of "race" is a human construct. Humans have been mixing up their gene pools since time immemorial, which makes all of us a bunch of mongrels - we haven't been subjected to selective breeding in the way that livestock and food plants have. For example, there is no geographic dividing line between Europeans and Asians, just a gradual shift. What we look like is not who we are; the genes for intelligence are not connected to skin color.