The addition of new subjects allows better insight into world history. Western Civilization is now filled out with the inclusion of Balkan and Scandinavian peoples, while Asiatic peoples are now filled out with the inclusion of Central Asian peoples. Africa has only begin with Eastern and Western Africa, and American Indians have only begun with Meso-America. Particular cities are not yet to the level where I can connect them yet, and specific social changes also not yet to the level where I can name them. Addition of Abrahamic religion brings in a major topic to history, and the category of particular families will also be useful. The role of the performing arts and philosophy in history can also be considered. The use of particular groups, such as the Abbadid dynasty, gives detail to history. Physical anthropology and human ecology are also somewhat useful. Personal studies haven't yet reached this point, and psychology is at too low a level to be really useful to history. Biology is also hard to related directly to history.
Study of Prehistory (up to 3000 BC) will definitely be aided by considering Asiatic peoples, which can be traced back at least this far, and the major institutions can also be traced back, although not in the detail I would like. Evidence for performing arts and philosophy is scanty compared to later periods. So far, I have no specific particular groups, although physical anthropology and human ecology form a large part of studies of prehistory, and this tends to merge with parts of biology.
Studies of Antiquity (3000 BC - 500 BC) are brought into much better focus by including Central Asia and Balkan peoples. Particular changes are possible, and the recognized origins of Abrahamic religion begin in antiquity. I am not aware of major developments in Performing arts or philosophy during this period, although they presumably existed. So far, I have no specificl particular groups, but physical anthropology and human ecology can also be connected.