This document provides an overview of human evolution and prehistoric periods from early hominids to ancient civilizations. It describes key early humans like Lucy, Homo erectus, and Neanderthals. It outlines the Paleolithic, Neolithic and Chalcolithic periods defined by tool materials (stone, polished stone, copper/bronze). It details the Indus Valley Civilization as an example of the Chalcolithic period, describing its large cities of Harappa and Mohenjo-Daro. Finally, it characterizes the Ancient, Medieval and Modern periods of civilization in terms of political structures, religions, arts, sciences and technologies.