I have difficulty believing that the humans would be able to simultaneously eject all the other races, but I understand this is critical to rest of the history and the nature of Atheus. It is internally consistent, which I like, but it seems to depend upon an unlikely event.
The same goes for keeping the barbarian races at bay. I would expect a horde of hungry and angry barbarians to be able to overwhelm the civilized lands. European history has more than a few instances of barbarians banding together with even less motivation to accomplish such a thing. (Then again, Caesar was able to conquer Gaul by pitting the tribes against each other, so I could be wrong.)
Having said all that, I see many possibilities in the way Atheus is set up. Lots of potential for conflict. I can't say I'm a big fan of the humans, especially the ones on the border. That kind of blatant segregation does not sit well with me. I'd probably want to play on the barbarian side, maybe as a troublemaking chieftain looking to unite with others and teach the humans a thing or two :)Go to Comment