A lack of empathy could signal an outsized propensity for cruelty. Simon Baron-Cohen is a professor of developmental psychopathology and director of the Autism Research Centre at the University of Cambridge. He joins host Krys Boyd to discuss the neuroscience of narcissism and psychopathy and the reasons someone might lack the ability to care. His book is “The Science of Evil: On Empathy and the Origins of Cruelty.”