This is a very important concept for men to understand, throughout all history when wars or invasions would happen it would be the men that would be wrecked and destroyed.
The women would just go with the winners where they would reproduce and become part of their society while the men’s bloodlines would literally be ended.
This explains why most women in history have reproduced whereas only a small fraction of the men have.
It also explains why to this day it is principally men who are concerned with war, borders, invasions and immigration because these things don’t really affect women.