I think bullying comes from a person's feeling of self-worth, and so what you do is you find out where you are in a totem pole, and you may slide in somewhere in the middle. So you say, "OK, well there's all these other people who I respect and admire, and there's all these people below me, so I'm going to put on them this sense that they're inferior and I'm going to belittle them, and that's going to raise my stature."
