We are all of the human "race".
Racial divisions are actually not as plentiful as many modern people think. For a long time, there were only
three recognized "races" (subdivisions) of people - White, Black, and Asian. Fairly recently, Aborigines were added as a different race. So, in a
sense, you are both correct. Back to the OP's topic, the question wasn't "who is better", but what could have lead to their being no remaining primitive peoples among a certain sub-race, if you will, being the whites of basic European descent. Not as a statement of superiority, but purely from an anthropological point of view.
As many have stated, this surely came from the harsher conditions faced, and the need to advance, simply to survive.

