The Sociopath is far from your ordinary criminal or villain. Combine a willingness to cross the Moral Event Horizon without a shred of guilt, a keen sense of other people's mental and emotional fault lines and a Lack of Empathy and you have the consummate evildoer.
The Sociopath displays the following:
Lack of Empathy: Utterly ruthless doesn't begin to describe him: except for when trying to [...] [tvtropes.org]