The Naked Storm. C.M. Kornbluth

At first it was just a lark–bribing the stewards to steal food, bribing the conductors to steal blankets, raiding the club car, becoming a trainful of drunks. But then–then they began stealing morphine, and after that they began swapping mates, and after that… <P> Finally the lights went out. And a modern-day miracle of streamlined engineering was turned into a cage of evil, human beings become beasts, and for three days the meaning of civilization was forgotten, and carnality ruled!