Apart from watching foreign cinema, which pretty much shows men are men throughout the known world, I've personally met a large cross-section of men from different cultures, albeit mainly western, none of whom particularly differ when it comes to bravado or over-confidence, especially in adolescence.
And many of other countries that I haven't met haven't even gone through female emancipation, I have no doubt the vast number of countries like that are far worse.
I just don't agree with you. And again, I've had to say it before this week, I'm not American and have never even been there. I've only met a couple of Americans in passing and they were all female or mormons. Mormons get a little special category of their own, those two were very strange.