[ianai]

I think bullies usually “learn” it somewhere - like being bullied themselves or outright abuse. Or they’re just budding psychopaths. (Which occur at 1/100 rate of the population-and I really wish this was considered more seriously.)

[throwaway3455de]

Statistically most schools have at least one psychopath.

Combine that with the primitive undeveloped child brains and human group behavior...

[ianai]

More like about one in three classes have at least one psychopath with class sizes around 30 students. Granted the other characteristics of these children as you say add a lot of other problems.