Originally Posted by Willravel

Consider, if you will, a plane crash in a remote place. In most cases, the instincts kick in and the whole group looks out for itself and the group stands a better chance of survival. Why? Simple. Long ago, it was much easier to hunt, defend, and raise young in groups. Before we had guns, you needed a group of skilled friends to bring down a bison or mammoth. You also couldn't single-handedly fight off a sabertooth tiger or short nose bear, you needed assistance. And for children, we find that larger homes, homes with more adults, are beneficial for a healthy child. We're a social species because when we're social in dangerous conditions, that cooperation means a better chance at survival.

Regarding a bunch of entitled kids in a classroom with a submissive teacher, these kids are programmed that there should be someone in charge in order to lead the group. When the adult can't fill that roll, others attempt to take the place. It's a bit of an oversimplification, but it's the best I can do without having to go open up old textbooks.