I grew up in Moscow, Russia in the 90ies (many people were not well off to say the least) and I was both super nerdy and extremely eh, daring (I would talk back to other kids who were much stronger/more popular than me all the time etc.). Sure, I was not popular, yet I was bullied lightly and almost never physically, mostly by a couple classmates who were just kinda generally messed up (interestingly enough both of them are software developers now, as far as I know), and in total perhaps for 2-3 years in late middle school (I think). The bullying just kinda never happened; I never thought much of that until I read stories like the ones here.
Sure, I hear it was worse outside of Moscow, but even in Moscow an average student's family in the 90ies was way poorer than say in Ohio. Outside of Moscow it's not even comparable. And yet, the level of bullying was probably still lower than what it seems to be in any average American school.
What's up with that?