No one needs to "prove" an obvious correlation. Why do people have such a hard time spotting root causes? The root cause here is obviously testosterone levels. There will be a precise correlation if anyone were to bother to check.
If you're interested on the subject, Robert Sapolsky has studied and written about Testosterone extensively. He has some videos up on Youtube as well as several books.
[1]: https://i.ebayimg.com/images/g/ZzMAAOSwscVlpdzW/s-l1200.jpg
Anyway, even at slightly above average IQ that makes me smarter than 4 billion humans. So yeah...."all of them". And I did use "all" that time. lol.
It's so easy to make fun of people who can't even read.
This is a patently absurd observation and you didn't even bother to offer an anecdote, as if that would make a difference anyways.
https://www.campussafetymagazine.com/insights/how-common-are...
But until you demonstrate that girls outnumber boys in terms of violent tendencies, you'll have to accept my rule as true and your exception as...an exception.
https://en.m.wikipedia.org/wiki/Homicide_statistics_by_gende...
”… found that men account for an average of 95% of all persons convicted of homicide, and almost 8 out of 10 of the victims”
Sure an overabundance of that molecule leads to "issues" (roid rage, etc), but a normal amount of it is why we crossed the oceans to find a new land, fought to defend ourselves in wars, landed on the moon, and every other thing that people with little drive would never have done. So I don't consider "maleness" a flaw, and anyone who does has a mental disorder.
https://news.ycombinator.com/item?id=43327023
But I'll add another side-anecdote: High-T men are more sexually driven, making them care more about appearance of women. What is that appearance? Wide hips and large other things too. All of which are a signal of more vital and healthy child bearing. So not only do they want more sex, they choose women which are more fertile to begin with. Not exactly rocket science, to make the logical connection there, and predict the outcome.