The document provides an overview of early civilizations in Mesopotamia and Egypt. It discusses the common characteristics they shared such as developing along major river valleys, having hierarchical societies, and the invention of writing. For Mesopotamia, it summarizes the four major civilizations - Sumerians, Akkadians, Babylonians and Assyrians. For Egypt, it outlines the importance of the Nile River, religious beliefs, and architectural and artistic achievements including pyramids, temples and sculptures. The document is intended to teach students about the origins and characteristics of these early civilizations.