With regards to your Origins of Civilization I think there should be some more developed kingdoms and empires to the west as well; with the spread of agriculture and trade people tend to organize, and sooner after that it's just a matter of time before kingdoms appear. I'm also wondering how nation 2 and 15 are able to withstand the onslaught by the 1 Empire? are they tributary states? Vassals? Or supported by the 14 Empire?