I do feel like Star Wars boils down to being anti-war. Yes, war is sometimes a horrible necessity. But it's only there to bring peace.
Suddenly Tolkien springs to mind. "War must be, while we defend our lives against a destroyer who would devour all; but I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend."
I mean you got to love Luke looking for a Jedi Master, a "great warrior." And what does he find? A little green person who tells him. "Wars not make one great." You don't get it as a kid. You think Luke is there to train to defeat Vader and the Emperor. But Yoda doesn't teach him about fighting or gives him lightsaber skills. (At that time George envisioned Jedi Masters as being strictly teachers of wisdom, not warriors.) And then in the climax of the originals. Luke declares himself a Jedi, after he's thrown away his lightsaber. When refuses to fight. All of the sudden Luke gets those lessons Yoda was trying to teach. He understands why he failed in the cave.
Gosh darn if that isn't just good writing. Simple. But sooo good.