Star Wars: Raiders of the Lost Empires
Any form of Galactic government was dissolved at the Battle of Bastion. The galaxy seemed stunned and for a while people simply lived. No claimants to any thrones rose up, inter-system trading never really built itself back up, and everyone left each other alone. Ideology was replaced with apathy; it wasn’t utopia, people just did what they continued to do. The grand states and alliances and inter-system communities naturally fell away and even communication dropped dramatically between worlds and systems.
It was a slow process, and is now known as The Decline. Sentient beings regressed and, generally, people were pretty happy. Of course, crime began to return but it was something people could live with. It became its own form of order and the crime lords consciously integrated with the community – they had nothing to gain from disorder.