Historically causal sex was rare, and it could be that the recent increase in this was an aberration, and people are just going back to the way it used to be done. This line: "On the other hand, sexual inactivity may hinder young adults’ psychosocial development and diminish their physical and emotional gratification (Julian 2018)." is just bizzare. People have done without casual sex for most of human history, I thi…
Wrong. Warfare for most of human history was an opportunity for rape, sexual slavery, and pillaging valuables. That's the entire reason one stranger would be willing to risk their life for someone they absolutely have no relationship to. The vast Roman legions ran on the prospect of these outcomes. Only in the last 200 years or so, scoping to continental Europe, has it even been considered that warfare become an occa…
People had to go to wars because you could get death penalty for treason (if you refuse to serve your empire, kingdom etc.) The things you are talking about were opportunistic, wars were always started by rulers motivated by expansionism and not by ordinary people motivated by greed and lust.
And yea all wars had mercenaries but they were minority not majority of the army.