Darwinian evolution will never succeed in disentangling itself from racism because it must always have its “official subhuman.”
Without the possibility of a design behind the universe, to ask “why” would truly be absurd.
Following Denyse O’Leary, I referred earlier to the curious but, on reflection, not surprising messy nature of the “magic” numbers that rule our universe.
If you’ve ever tuned a violin, you’ll know that the arrangement of the fine tuners on the tailpiece, once you’re done, looks arbitrary.
If I gave you 15 seconds you could come up with a pat evolutionary just-so story to account for this, speculating on what reproductive advantage it serves.