Sociopath

A Sociopath is a person  with a personality disorder manifesting itself in extreme antisocial attitudes and behavior and lack of conscience.  All sociopaths are born MAOA-L gene aka the warrior gene which controls the production of a protein that breaks down brain signaling chemicals like dopamine, noradrenalin which influence mood, But people who are born with this gene become sociopath when this gene is activated in their childhood. The warrior gene is activated through the environment that they are exposed to in their early life. Others can be born with this gene and not become a sociopath because they didn't have a rough and violent childhood so their warrior gene was never activated to become one.