On July 1, 1959, at Ypsilanti State Hospital in Michigan, the social psychologist Milton Rokeach brought together three paranoid schizophrenics: Clyde Benson, an elderly farmer and alcoholic; Joseph Cassel, a failed writer who was institutionalized after increasingly violent behavior toward his family; and Leon Gabor, a college dropout and veteran of World War II. The men had one thing in common: each believed himself to be Jesus Christ. Their...