" War, Plague, Famine and Death. We all know what happened the last time those four terrible entities were unleashed to cloud the brains of statesmen and rulers.’ ‘You’re referring to the Great War I take it.’ Rex said soberly. ‘Of course, and every adept knows that it started because one of the most terrible Satanists who ever lived found one of the secret gateways through which to release the four horsemen. "

― Dennis Wheatley , The Black Magic Series