>> When you tell him "society only needs a small percentage of men."

That looks to be a fairly near quote of something I posted earlier and I want to point out that was not what was said (in case you were quoting that).

Biologically (not socially) we only need a small percentage of men. Which ties in to the rest of what you are saying directly. Men (biologically) have a greater impetus to try to conquer and to take risks because their deaths are inconsequential to the task of propagating the species. We see this all over the animal kingdom and I don't think humans are much different at the end of it all.