Bloody hell, and I get accused of thread derailment!
I mentioned this in passing, hours ago, as a throwaway example of how hierarchies exert pressure on men to compete.
We have now drilled into this in excruciating detail for post after post after post because (I assume) Spaghetti and others think there is a chance they can somehow prove me wrong on something. If you really want to know how it works, it's easy to look up socialisation and male dominance hierarchies in nature.
Coming back to the point of the thread, as I stated earlier, there is a completely uncontroversial and easy to understand reason why men are on average more violent than women. It has been stated, on this thread, numerous times.