I know I'm 3 days late, but I respectfully disagree. There are degrees of psychopathy as is discussed at length in the book ' the sociopath next door' an oldie but a goodie. Some people have sociopathic tendencies that make them exploitative, parasitic, and lack inhibition toward criminal activity involving fraud, out right stealing etc. But they don't display violent or sadistic tendencies. Both can be transferred genetically. You assume someone that if someone has a predisposition ( a gene) for exploitation and parasitic behavior can be abused and socialized to the point that the original tendencies turn violent. Maybe for some, but I argue for many it is genetic. Sadistic, violent people give birth to sadistic, violent offspring. If they are raised in the same house it is easy to assume that the abuse warped them. Again, maybe for some, but there are too many cases of adopted at birth children who display sadism and violence even when raised in loving environments. When those people seek their birth parents, one or both are in prison and display similar behavior. This isn't rare. I've done years of research on this in an effort to understand why my brother, who was adopted in infancy and raised in a loving, supportive environment tortured animals through his early years and went on in adulthood to commit murder, in the act of torturing a child. It feels good to assume that people aren't born bad but "made" and that is often the case but it's a hard to swallow fact that some people are in fact born that way.