People who study the behavior of those who been called evil. The definition of evil is what is considered morally wrong, sinful or wicked. Serial killers and sociopaths and psychopaths, they can't tell between any of this things. People like this who are troubled and need to be kept away from society have lack of fear, empathy and interpersonal skills.
Socrates is a well know philosopher, who has given his opinion in many topics including the one about evil. Socrate's perspective on the nature of human evil is that morality is a term that refers to the creation of and to follow the rules that govern human behavior on the basis of some idea of right and wrong. Even though you might have a different concept of morality, to him it must help humans to be able to tell wrong from right. Socrates believed that nobody chooses to do wrong knowing that they are doing the wrong thing. He has always thought that if you do wrong somehow you are doing something harmful to yourself and that no one ever has wanted to hurt themselves in no way. To him because people are ignorant, is the reason why they do the wrong thing instead of the right thing. This means that it is impossible for a