I found a modded server where you can make your own nation and run it your way.
You can set up a government make laws and create ranks for your people. If you do not want to start one you can join a nation that already exists.
It uses the All the Mods 10 modpack and it says version 6.1. You need to get whitelisted first then a staff member helps you get started and gives you a beginner kit.
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