The document provides an overview of human origins and early civilizations. It describes key findings that show humans originated in Africa, including early hominid fossils in Ethiopia and Tanzania. Early humans were hunter-gatherers who developed tools and fire. The Neolithic Revolution led to agriculture beginning 10,000 years ago in the Fertile Crescent. Early civilizations then emerged in Mesopotamia with the Sumerians, in Egypt along the Nile River, and in the Indus River valley. These civilizations developed writing, social hierarchies, cities, and advanced technologies.