In today's episode, I spoke with Delroy Paulhus, a personality researcher focusing on antisocial, Dark Tetrad personality traits such as psychopathy, narcissism, Machiavellianism, and sadism. We spoke about how the internet provides a platform for sadists to get their kicks by trolling others online. And we spoke about the idea of human evil, our own shadow sides, and how we can better understand human malevolence.