Psychopaths are one of the most dangerous personality disorders that occur in humans and they are famous across the world for both real-life and fictional stories about the dangers of psychopaths. On top of that Machiavellian personality disorder is not quite psychopathy but is a disorder where people will use and hurt others for their own goals. These kind of personality disorders are obviously disorders that we would want to keep away from science-fiction-like technologies of mind uploading and immortality in a virtual world but Michael's work has found out that they are actually the kind of people most interested in getting to live forever in a machine. In this episode, we look at what Psychology can tell us about future technology and where it provides important warnings.