More history

I've been continuing a cycle of development in history. There isn't a whole lot I can do with early, middle, or late prehistory, since I keep running into barriers. The appropriate low-level divisions of social structure and change, institutions, and culture just aren't quite well enough developed. Much the same can be said for antiquity, though I did manage to link to some of the newer areas of social structure and change. The same for classical and medieval history. In modern history, I managed to extend the history of several cities backwards a century. In modern history, I was able to get several countries extended back. The US, China, India, and Indonesia now have sketches noting at least some of the highlights for the entire century, although Indonesia in particular still lacks events.