self interest with little understanding of emotions of others. Psychopath is someone who cannot tell right and wrong the traditional I thought I was stabbing a pumpkin. A sociopath will stab someone because it seemed like a good idea at the time. We are all sociopaths of sorts. A member of Peta comes to mind, kicking a homeless person out of the way to berate a fur bearing woman, for example.
thanx,
bill