Iperios is a modded server built around the idea of nations. You can make your own nation and pick your government style. You can set laws and create ranks for your people.
If you do not want to run a nation you can join one that already exists. A staff member helps you after you get whitelisted. They guide you and give you a beginner kit so you can start playing.
The server uses the All the Mods 10 modpack on version 5.4.
I found this modded server called Iperios and it is all about making nations. You can start your own nation and decide your own government and laws and ranks. If you do not want to make a nation you can just join one that already exists.
The server runs the Allthemods10 modpack with version 5.4 so you need that to play. You have to get whitelisted first and then you get the server info and some starter details.
When you join a staff member helps you at the start. They guide you and give you a beginner kit so you are not lost. After that you are free to play and build your nation or join others and see how their rules work.
This is a StoneBlock 4 server running on Minecraft 1.21.1 and it feels pretty smooth. It is hosted on dedicated hardware with 16 cores and 32GB of fast RAM so the server usually holds 20 tps and runs really stable.
The server is in Europe in Belarus and it also uses a proxy tunnel through Germany. Because of that players from the US and Asia usually get better ping and lower latency. It feels like the owner really cares about performance and connection.
There are fancy progression based ranks that you unlock as you advance in the game. These ranks are connected to a discord integration so your progress shows in game and on discord. It makes the grind feel more rewarding and gives you stuff to work toward.
The server started on October 30th so the world is still pretty fresh. It is a modded experience focused on StoneBlock style gameplay and progression. If you want a stable modded server with neat ranks and good ping this one looks like a solid pick.