[Blarg]

The mythic structure for Star Wars was already laid out by Joseph Campbell in his book, Hero with a Thousand Faces," before the first Star Wars was written. Lucas lifted the mythic structures, as did Spielberg in some of his films. Campbell's gathering together the myths and religions of the world and finding the commonalities in their structures has had a huge influence on Hollywood from the 70's onward, and writing courses are actually taught using his book and an abbreviated version made just for screenwriters as the primary texts.

Lucas himself publicly gives Campbell mucho credit for his influence on Star Wars.