This document outlines the key features of ancient civilizations, including advanced cities and architecture, specialized workers, and systems of record keeping such as writing. It discusses how early cities had strong central governments to provide order and administration, with rulers often claiming divine right to rule. Religions in ancient societies typically involved belief in multiple gods. Civilizations exhibited social hierarchies with priests and nobles at the top and slaves at the bottom. Public works like roads, bridges and irrigation systems supported cities. Writing systems started as pictograms and were used to keep records of trade, taxes and laws.