Let's put it this way. Opposable thumbs are such a massive fitness advantage, in so many ways that are obviously massively more impactful, that such a factor, if it even exists, would be utterly negligible.

So the only conceivable reasons to raise such a bizarre topic all involve you being a very unpleasant person to converse with -- the most generous I can think of being an unearned sense of intellectual superiority simply by the fact of raising an idea you see as taboo.

If you don't like discussing weird ideas or ideas that are unpopular or devil's advocacy, you would most probably find it unpleasant to converse with me. If you prefer glibly dismissing such ideas it would probably be mutual.

What are you hoping to achieve? Convince people thumbs are great rape tools? You act like glib dismissal is inappropriate as if you have some great insight to share. You do sound very unpleasant to talk to so at least you're self aware.

The extent to which aggression differences between sexes is the result of nature or nurture seems to have policy implications. For instance it would change the balance between the effectiveness of re-training versus more physical interventions. If men indeed have a hard-wired tendency toward sexual violence, it gives cultural interventions a lower return on investment and incarceration a relatively higher one.

For instance there has recently been a lot of controversy around the claim by J.K. Rowling that studies show that transgender males have the same rates of sexual predation as other males. Understanding of the balance of biological versus social influence informs that debate.

To improve our selves we must know our selves.

> For instance there has recently been a lot of controversy around the claim by J.K. Rowling that studies show that transgender males have the same rates of sexual predation as other males.

It's quite odd that this is even controversial. Like why should this one subset of males differ in this way from the rest?

If anything, one might expect them to be even more predatory than other males, given how little regard they have for women's boundaries.