It is very tempting to use evolutionary psychology to explain EVERYTHING.
The danger is that it’s pretty hard to DISprove evolutionary psychology theories.
Thus if I claim that violence in the modern world is all predetermined due to the hormonal instincts of primitive hunter-gatherers who lived 40,000 years ago, it sounds plausible, but it’s hard to TEST.
If I claim that the modern nastiness of “relational aggression” is all just a resurgence of Stone Age dominance-fighting within primate tribes, it sounds very reasonable, but it’s not necessarily a useful or productive explanation.
Unca Bob has his own take on a contemporary mass murder – from the viewpoint of personal common sense, not evolutionary psych – at this link: