Dr. Strangemonkey said:Interestingly, men who have lower levels of testerone are far more aggressive than men with normal or greater levels. It's one of the things you can find out if you know people who work in psychiatric hospitals.
I know that can be the case, but I don't think it's always so - eunuchs are not noted for their aggression, although they can be excellent soldiers - I think Ottoman Mameluks (sp?) come into this category. I wonder if men with lower testosterone also have more variable testosterone levels, which might explain it?
In any case my point was more that young men tend to be more directly aggressive than young women, whatever the reason, and also being on average stronger and with more of a pack mentality are typically better suited to the warrior role than most women, although in modern armies there are plenty of combat/support roles women may actually be better at on average, once cultural factors are discarded.