I found a structured 18+ Minecraft Java Edition SMP that runs the ATM10 modpack. It is built for long term survival where you actually progress through economy industry magic and tech.
Players can create or join a nation. You can claim land and build real infrastructure like farms factories and automation then set up shops and fight for trade power.
Politics are a big deal here. You can make alliances and treaties or start rivalries. PvP is allowed with probable cause and wars are formal.
Raiding only happens during declared wars and only during set raid times. Player disputes are pushed to be handled in game through war declarations or courtroom trials.
The start date is Wednesday March 4th at 4:00PM CST.
