The most recent round of studies hasn't added much to my knowledge of prehistory, which isn't well subdivided.
Antiquity is a little more developed, and can introduce the early 1st millennium as a stub. to be expanded later.
Classical and medieval history has a very little more that can be added to it. I trace modern secularism to this period. the Abbasid dynasty and Jesus belong to this period. In particular, the late medeival period is being developed somewhat with the 14th century (1300s) added as a stub and the 15th century (the 1400s) a little bettier developed.
Most of the more recent develolpments can be applied to modern history. The extension of North American englis-speaking peoples, the addition of more African and Native American peoples, New York City, and consideration of Industrial peoples also belong to this period. Secularism developed substantially during this period, and international governments also developed. There was substantial improvement in the applied sciences and growth of buildings. Among the particular groups, the Abbey Theatre belongs to this period.
The 16th century and the 17th century don't quite have the full range of development yet.
Beginning in the 18th century, I can start looking at North American colonial and revolutionary history better, and the beginnings of industrial societies can be found.
In the 19th century, North American peoples were becoming prominent along with other Anglic peoples, and secularism became considerably more acceptable. There was considerable growth of industrial peoples.
I've also added a few more sites to the sidebar here.