The prelude to this was set by another psychoanalyst called Otto Rank one of Freud's er early followers who had published a book called the Myth of the Birth of the Hero and in this book what Rank did was to trawl through world folklore and literature, from myths of heroes, and of course there are a lot of those  books, and dozens and dozens of them and what he does in the book is he distils all these dozens and dozens of myths and he finds that there's a common pattern emerges and it's, it's pretty stereotypical actually and the common pattern is the hero is born of royal or divine parents, the hero for some reason or other that loses his parents or is cast out by them or is er exposed in some way, erm  the hero is often threatened by some outside force and then rescued by er humble people.