This document provides a summary of world history from 3 million BC to 1500 AD in brief sections. It describes early humans migrating out of Africa around 3 million BC with no written language. The Neolithic Revolution beginning around 8000 BC marked the beginning of civilization with agriculture, permanent settlements, and the first forms of writing. River valley civilizations like Egypt, Mesopotamia, India, and China emerged around 4000 BC each with their own governments, writing systems, architecture, and religions. Major early societies included the ancient Hebrews, Greeks, Romans, the rise of Islam, classical China and India, feudal Europe during the Middle Ages, and the Aztec and Inca empires in the Americas. The Renaissance and major