It is difficult to explain human behavior because there are so many diversities of it. Each person is an individual and, for example, if they are traumatized one individual may get over it quickly, while the other may carry it throughout the rest of their lifetime unless they seek professional help. Of course there is twisted human behavior when individuals can kill in many different ways and for each of those individuals they may or may not have what they consider an excuse for their actions. Example: One individual may have been brought up in a dysfunctional environment; beaten and abused or even in some cases be taught to kill. Then there are those individuals who have no morality about how they kill. The brain is the least explored part of the human anatomy and that is what makes it difficult to get to the root of many of the psychological problems individuals have. There is no one perspective.
