theme for a fantasy campaign

[Bengt]

The standard multirace settings always bugs me. If they are seriously restricted to certain terrain types it gets more plausible. I don't think it's a good idea for one race to be forced to trade for their very survival, it makes them too weak in the long run. Dwarves could grow stuff underground in geothermal heat or something. It's better if everyone trades for something that is very convenient but not absolutely essential.

How hard are you planning to lock them to their land? Personally I think it should be pretty harsh, e.g. a race is only fertile if they eat food grown in their natural habitat. That would still allow Adventurers to travel about.

How possible will terraforming be?