Why Genocide Occurs

I think that genocide keeps happening because of the fact that people of a different race think that they are the best ones and nobody is better than them. I'm not saying that everyone is like that, but maybe there are people out there who are and have the power to do what has been done before in the past. I really dont think that we can do anything to stop genocide except to keep writing about what has happen in the past so history doesn't repeat itself. Just like Night and all of the other books about the holocaust and etc.