We lie to ourselves and try to escape that bitter reality by saying that the world is divided into good guys and bad guys, and that we're the good guys. We condemn people as evil to reassure us that we're not like them. If there's to be any hope of preventing these things from happening again, we have to look at the reality. That any act of evil in our history was committed by human beings like us. That, very often, we're all implicated in it.