It was an almost universal rite of passage in pre-pastoral culture that young men were sent to the forest or savannah, jungle or distant mountain range to single-handedly kill the wolf, the lion, the grizzly bear or whichever animal represented the greatest challenge to his community. If that young man returned with a trophy, his path to life’s next milestone was open and success a possibility. If he did not, it was no more than evolution in action and the tribe moved on.