Food shortage led to people moving to the plans which led to an uncontrolled water supply causing Mesopotamia to build irrigation systems. This let to fights / stealing and eventually cooperation and team work.
Population increased in Mesopotamia causing a food shortage and people to move to the plains (Sumer )
uncontrolled water supply
Sumerians used leaves, canals and dams
Each settlement had its own ruler and farm land - like a small country.
People had to work together to take care of the system, causing them to live in larger communities.
Land between two rivers (Tigris and Euphrates )
Plains, lacked natural barriers to keep out enemies.
Study Guide for Rise of the Sumerian City-States13 terms