How does it relate to the study of evil and harm?

Self-esteem is often a topic of interest in psychology courses. How does it relate to the study of evil and harm? Are harm-doers more likely to be high in self-esteem or low in self-esteem? With regard to self-esteem, what is a potent recipe for violence? Could current trends in self-esteem building be dangerous? With all of your answers to these questions, make sure to include proofs and examples.