In Asia, for the older generations, economics and culture settled it. The pattern of procreation was settled by economics and culture. The richer you are, the more successful you are, the more wives you have, the more children you have. That’s the way it was settled.You read Hong Lou Meng, A Dream of the Red Chamber, or you read Jin Ping Mei, and you’ll find Chinese society in the 16th, 17th century described. So the successful merchant or the mandarin, he gets the pick of all the rich men’s daughters and the prettiest village girls and has probably five, six, seven, eight, nine, ten different wives and concubines and many children. And the poor labourer who’s dumb and slow, he’s neutered. It’s like the lion or the stag that’s outside the flock. He has no harems, so he does not pass his genes down.
These days as Asia becomes more westernised, this sort of artificial procreation pattern (betabuxxing) loses its influence on society. The artificial procreation pattern described above is bad since it leads to sub-human children who are often poorly constituted.
In natural selection, it does not matter if the man is dumb and slow, like the labourer, since these traits are not passed down to the child. However, it does matter that he has broad shoulders and narrow hips, in other words manly, since these are the traits which are passed down to children.