The document provides an outline for a lecture on early river valley civilizations, focusing on the Sumerian civilization in Mesopotamia. The geography of the fertile crescent along the Tigris and Euphrates rivers supported the rise of city-states like Ur and Uruk. Each city had its own government and patron god. Sumerian culture included polytheistic religious beliefs documented in texts like the Epic of Gilgamesh, a stratified social structure, and technological innovations like writing, the wheel, and bronze. Sargon of Akkad later established the first empire by uniting the city-states. The Babylonian empire followed and was led by Hammurabi, who issued a famous code of