Politics

Given the dangerous nature of travel longer than the daylight hours, I've realized that there are two or three categories of society that would develop in such a land. The most powerful is a conglomeration of nearby cities, towns and villages that can create and maintain lighted roadways resulting in a true nation-state of small scale. Given enough time and resources such a confederation would become a very powerful force or a decadent ruin, both on the Roman model. The next most powerful would be independent city-states that control all area within a day or two of travel. These could have warlords leading the continual battles to keep the realm safe from darkness (and rebels) or they could have a different government; however, people tend to focus on a single strong leader so autocracy and tyranny are the most likely governments for these. Finally, small tribal communities would be reasonable. Some might be nomadic but most would be stationary, like miniature city-states.

Okay, I've got a basic outline for my 'nations'. Time to apply.
We'll need one (or more) conglomeration(s). They'd be the source of the best weapons and armors available and could be a stabilizing and unifying factor over the very long term. So, would that be because of the Sisterhood of the Burning Blade or would they be responsible for a different conglomeration? Or an attempted conglomeration? Two conglomerations, one 'traditional' forged by uniting a region under one 'king' and the second will be thanks to the Burning Blade, a much more recent and energetic conglomeration.
Next is a handful or two of the city states. I'm not sure how many I want but at least a dozen ones. Most have delusions of grandeur.
Finally, every village, tribe and town not already a part of the world is set up. Remember, establishing a new community is very dangerous so towns will usually be clumped together. So, if it takes more than one day to reach the next town in a given direction then it is equally likely to be a sun of travel as it is to be two days of travel.

More details to follow as I figure out the personalities involved.