The Anthill that's on Chill

This takes place in a world where Saturn has been terraformed enough to not be completely inhabitable, but it has split in half by a wall that is now taller than the atmosphere can reach. While one half is a utopia of druids, where everyone is a vegetarian and everything is green, the other half is a dystopian wasteland where you need to not only be powerful but also creative in order to survive, food may not be scarce but the people are more than enough to create the need to ration your consumables. There are no powerless humans on Saturn anymore, they have all either died in the wasteland or been bred to extinction.