Joseph Campbell's monomyth, or the hero's journey, is a basic pattern that its proponents argue is found in many narratives from around the world. This widely distributed pattern was described by Campbell in The Hero with a Thousand Faces (1949).In a monomyth, the hero begins in the ordinary world, and receives a call to enter an unknown world of strange powers and events. The hero who accepts the call to enter this strange world must face tasks and trials, either alone or with assistance. In the most intense versions of the narrative, the hero must survive a severe challenge, often with help. If the hero survives, he may achieve a great gift or "boon." The hero must then decide whether to return to the ordinary world with this boon. If the hero does decide to return, he or she often faces challenges on the return journey. If the hero returns successfully, the boon or gift may be used to improve the world.