Stinky SMP is an anarchy server where people can do what they want.
The big thing is clans. You can join one or make your own and set your own rules for your group.
It ends up being messy and intense because clans can fight and everyone plays their own way.
Stinky SMP Anarchy With Clan Wars
GG.MINEWIND.NET New Server IPMinecraftOffline Anarchy With Permanent Map
MinecraftOffline is an anarchy server where players can do their thing and the world is meant to last. The map is permanent so builds and damage can stick around for a long time.
It runs on version 1.21.11 and it uses a custom plugin suite. The server is based in Finland so it should feel smoother for players in Europe.
The hardware is listed too so it seems like the owner cares about keeping it stable. If you want a server that sounds serious about uptime and long term chaos this one fits that vibe.GG.MINEWIND.NET New Server IP