This document discusses the origins and requirements for ancient cities. It notes that early cities like Uruk in Mesopotamia arose around 4000-3100 BCE due to developments in agriculture and trade that allowed for concentrated populations. Key requirements included stable food production and supply, jobs, services, social organization and defense. Cities provided benefits like security, artisan production, technological advances, trade, and the development of writing and formal religion. The document then highlights several important aspects of early Mesopotamian civilizations like the invention of writing in Sumeria and important figures and texts like the Epic of Gilgamesh.