The late 3rd millennium BC from 2500 BC to 2000 BC was investigated in later periods of antiquity, classical and medieval times, and has been more investigated in modern times, chiefly beginning in the 18th century. With archaeological discoveries in the 19th century, 20th century, and 21st century, knowledge of it has been improving.
Asiatic peoples remained the most important, and Middle Eastern peoples the most prominent of those. In Egypt, the Old kingdom of Egypt in the 5th and 6th dynasties, the first intermediate period, and the Middle kingdom with the 11th dynasty prevailed. Mesopotamian peoples were also prominent, although details are somewhat obscure until I have covered more of the history of Iraq. Hattian and Hurrian peoples were present in what is now Turkey. I have connections to Arabian and Levantine peoples, although not much detail until I get to more specific countries. I have not brought North African and Persian peoples back this far yet.
In South Asia, the Harappan civiliation reached its height in what is now Pakistan. Oriental, Southeast Asian and Oceanic, and Central Asian peoples are not yet closely examined.
European peoples had not developed as much, although among Balkan peoples and specifically Greek peoples, Minoan civilization was present. I only have mention of the peoples of what are now Latin, Northeast European, and Germanic regions.
African peoples can also be considered. East African peoples were the most prominent. Interior East African peoples may have been the most important, but I am still bringing back the history of Sudan from modern times. I don’t yet have details of Northern East African or Central East African peoples. For Western Africa, I am still bringing back Interior West Africa through classical and medieval times. Southern Africa and Central Africa also do not have much detail.
American Indian peoples have limited mention of Middle American Indian peoples, and South American Indian peoples.
Agrarian developments and agrarian society were the most prominent in this century, but I do not yet have details. Pagan religion and Asian religion were predominant. International government began in this period, but national governments can also be traced. Government activity including such things as warfare, diplomacy, and intelligence is applicable, among various peoples, and government structure and law can also be considered. Economic systems, industries, and economic activity can also be traced, and school systems. Families and elements of culture are mentioned, but again, I don’t yet have many details.