Hi there: I know there used to be a code base out there that was almost like civilization building. It had mobs which would independently build villages and the like. Does anyone know of anything like that out there?
CornMUD was certainly the most advanced game of its kind.
However perhaps the OP is thinking of EmpireMUD?
I also used to run a mud where players could gather resources to build settlements, but the mobs didn't build anything (they were all just animals). The same with ASSAULT I believe, which lets players build military bases.