On: Most young men are single. Most young women are no...

[mharig]

If you get killed, all your sorrows go away. And as weaklings get more likely killed, the species evolves in a positive way.

So it is a win-win-win strategy.

[ImPostingOnHN → mharig]

the undrafted men, and thus most likely survivors, were largely ones who failed to meet minimum physical standards of the military, so not sure on that last point

[mharig → ImPostingOnHN]

Source?

And do not take the word 'weakling' too narrow. Weak mind, weak immune system,... have of course its influence on survival probability.