The Neuroscientist Who Discovered He Was a Psychopath (2013)

Eventually, based on further neurological and behavioral research into psychopathy, he decided he was indeed a psychopath—just a relatively good kind, what he and others call a “pro-social psychopath,” someone who has difficulty feeling true empathy for others but still keeps his behavior roughly within socially-acceptable bounds. Not all psychopaths kill; some, like Fallon, exhibit other sorts of psychopathic behavior. Why has Fallon been able to temper his behavior, while other people with similar genetics and brain turn violent and end up in prison?

Source: www.smithsonianmag.com