Science and back to history

I decided to take a break from history and do some work on science, and completed a bunch of categories that had been unfinished and hanging. However, after a few days of this I decided that it wasn't being driven by the actual needs of the rest of the base and went back to history.

I also decided that adding just one nation at a time was much too painfully slow and inefficient, especially since their order of historical importance is only weakly connected to their size in population. Since I don't have a ranking in order of historical importance, and it would be a real challenge to come up with one, I've decided to go back to taking them in bigger chunks.
I started that with prehistory, and found that I hadn't worked all the various blocks of nations back that far. Same with classical and medieval history, although I added enough realize that m classical and medieval overview of western civilization was bad, and rewrote that. I got all the various blocks of nations connected to modern history, so that part's fixed.
So, going into detail of modern history. I started with the 17th century, and went ahead and finished adding pages for the 20 year subdivisions. I have this done for 4 of the 5 centuries of the modern era, and I'm anxious to get this finished up. I'm also inching backwards through the 18th century and added more nations. I started adding some biographical references to the 20 year pages of the 19th century and I'm looking forward to getting back to it.