I want to point out that psychopathy is a colloquial term, not a clinical one. The most popular set of criteria, the Psychopathy Checklist - Revised, is not empirically reliable or valid. Its creator Robert Hare has made a lucrative career out of convincing the world (and the prison system) that psychopaths are Definitely Real. The PCL-R is used to justify harsher punishments and longer prison sentences, and it’s completely made up.