The document summarizes the key aspects of several early civilizations including Mesopotamia, Egypt, Indus Valley, China, and Olmec. It outlines the date of origin, location, social structure, politics, economy, and culture of each civilization. Key details provided include Mesopotamia establishing the first system of writing called cuneiform and Egypt preserving dead bodies and building large pyramids. The Indus Valley civilization had well-planned cities and a drainage system while China respected ancestors and invented the wheel. The Olmec lived in southern Mexico and had a long-count calendar.