skyjedi2005 said:
Lucas ...... is the most successful film maker in the history of the medium. He not only changed cinema forever and brought the technologies forward that are still advancing, but wrote the rules of the blockbuster

There's no denying that Lucas changed film. ILM is the gold standard. No doubt, he created one of the most popular franchises of all time (Star Wars), as well as being on the team of another (Indiana Jones). Add American Graffiti to the list and Lucas becomes legendary. However, I would have to give the title of most successful film maker in history to Spielberg. As far as writing the rules of the summer blockbuster, I'd give that to Spielberg also.