After the death of the Princess Thrall, the nobles who executed her government continued to meet and conduct the business of empire.
After the death of the Princess Thrall, the Council of Regents continued to meet and honor the peace for some time. One woman would be offered up from each of the original five empires per year, and chained to the throne as a group. Many of the festival queens you see today are inspired by this tradition.
With human society stable and peaceful, it was only a matter of time before revolutionary thinking cropped up again. This time it was more of a nationalist flavor. In the time since the wars, local cultures had a chance to flourish. Language was largely uniform thanks to the AIs’ influence on communication, but customs and traditions gave people a national identity that they wanted to see reflected.
Over the next two centuries, local independence movements chipped away at the authority of the Council of Regents. Some set up their own copies of the Council, claiming authority over all of Torei. Some brought in polar Emissaries and boasted that they’d bring back the heroic age that had settled their land. In all, the Regents were as tone-deaf as the AIs had been, and they responded to uprisings with brutality.
Once the dust settled, the rough borders of modern Torei were laid down. One can look at a map of Torei from three hundred years ago and still identify almost all of the nations based on a modern atlas. Unity was gone, but trade struggles replaced war as the means for jockeying among the ringdoms. The AIs had become experts at the use of political economy to control the human settlements, as the ringdoms weren’t so eager to sacrifice quality of life once they’d re-gained stability.
And who knows where Torei would have gone if this had been allowed to continue?