natural selection

I was recently pondering aloud about a real concern I've been carrying for a while: if I had been born an indian, how would I have survived because without contacts or glasses, I'm pretty much blind. Would I have just sat by the fire, weaving baskets? I surely couldn't hunt buffalo or gather berries. Then TJ informed me that I probably wouldn't have been a choice bride by nature so I would have been left as a lonely old spinster who no one wanted to mate with and by natural selection my gene defect would go extinct.

 So, pretty much if I had been born an indian, my life wouldn't be that much different.