Martians, a reincarnated Irish woman, a dead movie star, an insane anesthetist, and an obsessed U.S. Attorney General ― these disparate characters have something in common. Each was at the center of an incident of mass hysteria, in which frightened, grieving, and otherwise disturbed people abandoned their common sense. This fascinating book by a prominent psychologist explores several intriguing case histories of mass hysteria, from "The Great...