The term witch-hunt is used today to describe everything from political scandals to school board shake-ups. But its origins are far from trivial. Long before the Salem witch trials, women and men were rounded up by neighbours, accused of committing horrific crimes using supernatural powers, scrutinised by priests and juries and promptly executed. The belief in witchcraft - and the deep fear of evil it instilled in communities - led to a cycle of accusation, anger, and purging that has occurred repeatedly in the West for centuries. Award-winning historian, John Demos, puts this cultural paranoia in context. He takes readers from the early Christians persecuted in Rome through the Salem witch trials, McCarthy's hunt for communists and the hysteria around child sex-abuse cases and satanic cults in the 1980s. An original and fascinating look at the cultural, social and psychological practice of witch-hunts, THE ENEMY WITHIN illuminates the dark side of communities driven to rid themselves of evil, no matter what the cost.