A doomsday cult is a cult that believes in apocalypticism and millenarianism, including both those that predict disaster and those that attempt to destroy the entire universe.[1] Sociologist John Lofland coined the term doomsday cult in his 1966 study of a group of members of the Unification Church of the United States: Doomsday Cult: A Study of Conversion, Proselytization, and Maintenance of Faith. In 1958, Leon Festinger published a study of a group with cataclysmic predictions: When Prophecy Fails: A Social and Psychological Study of a Modern Group that Predicted the Destruction of the World.[2][3][4]