Guest: Abigail Marsh

An heroic act by a stranger during car accident started ABIGAIL MARSH wondering what makes some people so compassionate that they’d risk their lives to help a total stranger. Marsh went on to become a social psychologist and a professor at Georgetown University.  She’s spent her career researching the human brain and people who are either extremely generous and altruistic, or cruel and psychopathic. In this hour of Radio Times, Marsh discusses her new book, The Fear Factor: How One Emotion Connects Altruists, Psychopaths, and Everyone In-Between.