Now, I'm not accusing him of anything because I haven't heard a vast majority of his scores. But this came up during a conversation with my friends. I was telling them how Hans Zimmer does "steal" from himself a lot (He's a Pirate from Drop Zone, Man Of Steel Them from Pirates ascending 3-chord motif, etc). Now they told me Williams steals from himself a lot because his scores sound so similar (Star Wars, Indiana Jones, Superman). I know composers do this all the time (I believe a thread