In the episode "Justice" Wesley accidentally commits a capital offense, but Picard gets him off the hook by appealing to the Edo's "God", the interdimensional alien being who watches over the Edo people.
What happens next? Sure, Picard and crew move on to their next adventure, but I mean for the Edo. Their laws haven't been broken for a long time, and they've never seen anyone get away with a crime. Does this cause a change in their reasoning about crime, maybe start the next phase of their social evolution, or do they just move on like it never happened?