Ever since the end of the Second World War, Hitler and the main Nazi leaders have defied the scientific community: how does one explain the psychology of politicians responsible for the worst atrocities and showing no remorse for their actions? Psychohistory, the discipline that combines psychology and history, posited the existence of a direct correlation between the intensity of the Nazi extremists’ psychological disturbances and the intensity of their cruelty (Friedländer, 1978). But such a model cannot be generalised. Many patients suffering from severe mental disorders do not show any sign of violence towards their environment.