Early civilizations

The earliest civilizations developed around bodies of water that enabled them to build and spread their societies and cultures. Choose three civilizations (Persians, Greeks, and the Romans) and explain how they developed and fell. What aspects of their civilization were the most important or innovative? What religions or philosophies did they embrace? How were people organized into groups and what were the people in the various groups able to do? Be sure to explain and back up your points with details about the societies.