Also recommended, Chris Taylor's How Star Wars Conquered the Universe. Ask any craftsman or entrepreneur and they'll tell you the first draft is just a template, that much of any great work or company comes in the iteration and editing and endless revision. Taylor's book, aside from being a great history of the making of the movie, is testament to that truth. What Star Wars began as and what it ended up as are so different it's stunning.
Lastly, one of my favorite Tyler Cowen posts: the public choice economics of Star Wars: a Straussian reading.
The core point is that the Jedi are not to be trusted:
1. The Jedi and Jedi-in-training sell out like crazy. Even the evil Count Dooku was once a Jedi knight.
2. What do the Jedi Council want anyway? The Anakin critique of the Jedi Council rings somewhat true (this is from the new movie, alas I cannot say more, but the argument could be strengthened by citing the relevant detail). Aren’t they a kind of out-of-control Supreme Court, not even requiring Senate approval (with or without filibuster), and heavily armed at that? As I understand it, they vote each other into the office, have license to kill, and seek to control galactic affairs. Talk about unaccountable power used toward secret and mysterious ends.
3. Obi-Wan told Luke scores of lies, including the big whopper that his dad was dead.
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6. The prophecy was that Anakin (Darth) will restore order and balance to the force. How true this turns out to be. But none of the Jedi can begin to understand what this means. Yes, you have to get rid of the bad guys. But you also have to get rid of the Jedi. The Jedi are, after all, the primary supply source and training ground for the bad guys. Anakin/Darth manages to get rid of both, so he really is the hero of the story. (It is also interesting which group of "Jedi" Darth kills first, but that would be telling.)
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8. The core message is that power corrupts, but also that good guys have power too. Our possible safety lies in our humanity, not in our desires to transcend it or wield strange forces to our advantage.
One can argue the Jedi are the source of all strife in the Star Wars universe, playing the key role in Lucas's critique of fascism or religious fanaticism.