This document discusses the historical development of governments from primitive societies to early civilizations like Sumer. It describes how the rise of agriculture and the need to coordinate irrigation led to the emergence of centralized authority and monarchy in early Sumerian cities to manage water distribution. As these cities developed further, political and social hierarchies became more complex, with specialized roles emerging for priests, warriors, farmers and tax collectors. Military leadership also became an important part of kingship as the cities engaged in conflicts over resources and territory. The patterns set in early civilizations like Sumer were influential and spread with them as trade carried aspects of their civilizations and forms of government to other societies.