Early Valley Civilizations (3500-4050 BC)
      I.        Previewing Main Ideas
1.    Interaction with Environment
·     Earliest Civilizations formed on fertile river plains
·     Challenges are seasonal flooding and limited growing area
2.    Power and Authority 
·     Projects like irrigation systems required leadership and laws
3.    Science and Technology
·     Earliest Civilizations developed bronze tools (ex. Wheel, sail, plow, writing, and mathematics)
·     These spread through trade
     II.        Why do communities need laws?
·     Babylonian Empire hold people accountable for their actions
   III.        City-States in Mesopotamia
1.    Geography of the Fertile Crescent
·     Desert climates dominates between Persian Gulf and the Mediterranean Sea
·     Mesopotamia is a plain near the Mediterranean Sea, means “land between the rivers” in Greek 
2.    Solving Problems through Organization 
·     What are three solutions to the environment changes od Mesopotamia?
a)    Provide water, dug irrigation ditches that carried river water to their fields.

b)   Built city walls with mud bricks to defend themselves from opposing cities 

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