The document discusses the rise of civilization in Mesopotamia and Sumer. It describes how villages grew into cities as advances in technology allowed for larger harvests and populations. Civilization is defined as having five characteristics: advanced cities, specialized workers, complex institutions, record keeping, and advanced technology. The Sumerians exemplified these characteristics through their creation of city-states with temples, priests, ziggurats, social classes, and a writing system. Their cities like Ur flourished over 5,000 years ago and influenced later empires through cultural diffusion.