Iperios is a modded server that uses the Allthemods10 pack version 5.4. The whole idea is about building nations. You can make your own nation and pick how it works. You can choose your style of government and set up laws and ranks for players.
If you do not feel like making a nation you can just join one that already exists. Staff helps new players a lot. When you get on the server a staff member will guide you and give you a starter kit so you are not lost at the beginning.
The server is whitelist so you have to join the community first and get accepted. You also need to have the ATM10 modpack installed on version 5.4 or it will not work. After that you can jump in and start playing and growing your nation with other people.
Iperios Nations ATM10 Survival
GG.MINEWIND.NET New Server IPIperios ATM10 Modded Nations SMP
I found this modded server called Iperios and it is all about making nations. You can start your own nation and choose how it is run. You make your own government and your own laws and your own ranks. If that sounds like too much work you can just join someone else and help their nation grow.
The server runs the Allthemods10 modpack on version 5.3.1 so you need that to play. You have to join the server discord first and ask to get whitelisted. Then you read the new player info to get the IP and some basic tips.
When you first join a staff member helps you. They guide you so you know what to do and they give you a beginner kit. After that you are free to start building and join or create a nation.
The rules are not fully listed but it feels organized and pretty friendly because you talk to staff first and you have to get whitelisted. It seems like a good place if you like modded Minecraft with more politics and nations instead of just solo survival.GG.MINEWIND.NET New Server IP