system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are different eye colors more common in Caucasians than other races?

In short, why is it nigh impossible for blacks or Asians that don't have an ounce of European in their blood to have blue eyes?

Edit: Thank you everyone for your answers! Can I no longer mark these as explained?
gpt
All people alive today who have blue eyes share a common ancestor who had the mutated gene that caused it sometime between 6 and 10 thousand years ago in the caucus mountains. Not very many Africans or East Asians have any ancestors that lived in this place, but Arabs and Persians do, which is why you'll sometimes see blue eyes from them as well.