I agree with Venus, some people are just bad people (if we don't want to use the term "evil). Probably happens more with antisocial personalities than with others although anything is possible. And not that I am an expert because I am in school, but we talk about this all the time, and I think it is so fascinating. Like it or not parenting absolutely has an impact on how a person develops, good and sometimes bad.

There tends to be a stereotype, especially with AS kids lack empathy and therefore don't have a conscience. But this is just not true. They have feelings, they just can't lable and understand them. Antisocial personality disordered people are different. They do understand other people's feelings (how they manage to be so manipulative), but have no regard for them. I only point out Asperger's here because I think a lot of people lack empathy for various reasons, but that doesn't make them bad people at all. Many strive to understand other people better so they can get along in the world. They can be difficult people, but that can be worked with.