This document summarizes the history of major human societies from 50,000 years ago to the rise of early modern empires. It describes how early human groups migrated along coastlines as languages developed. Some societies became dominant due to abundant resources and easier diffusion of ideas within Eurasia. The Fertile Crescent declined after forests were cleared, while China isolated itself and fell behind innovations. Power shifted to empires like Greece, Rome, and Spain through military conquests and colonial expansion enabled by discoveries like Columbus' voyage to the New World in 1492.