I don’t think it’s any one factor. I actually think it’s dangerous to think that there iis - the idea that there is some inherent gene or trait or personality type or social condition or event that makes a person evil, has, ironically led to some evil things. The world is a complex web of cause and effect and belief and experience and different ways of reacting to emotion and different decision making and every person is located in a different relationship to all of those things. There’s no one type or person or type of environment or situation that causes bad things, just a series of complex things that are worth being nuanced and thoughtful about.