Not many Americans will find this essay an enjoyable read, but that is not its purpose.
I am an accountant by profession, not a historian, political scientist, economist, or scientist, and this essay should to be read with that in mind.
Hunter-gatherer lifestyle is increasingly unsustainable. Domestication Revolution begins in Fertile Crescent and the Americas. Migration wave of pastoral societies from steppe regions (generally between the Caspian and Black Seas) into the Fertile Crescent, India, and Europe.
Wheat, peas and olives domesticated in Fertile Crescent. State bureaucracy and military establishment are developed. The Pacific Northwest marine-based culture begins fully developing, from southern Alaska to Northern California. Intense deforestation of the region from Morocco to Afghanistan commences.
An epidemic sweeps through the Roman Empire until 270, killing 5,000 of Rome’s citizens each day during the epidemic’s peak, including the Emperor Claudius in 270.
Rome was forced by the population loss to recruit barbarian troops.
In the Caribbean, agricultural Arawakan peoples begin migrating along the archipelago from South America, eventually displacing/absorbing the hunter-gatherer peoples there.