How did the sumerians adapt to their environment to eventually create a farming surplus?

The sumerians lived in Mesopotamia in the Middle of two rivers, the Tigris and the Euphrates. While the soil was very fertil and productive, living between two rivers brought unexpected floods that caused great damage to the crops. The Sumerians eventually invented a system of ditches and irrigation to learn to control the flow of the rivers.

the civil war was a fulfillment and completion of the constitution, not a revolution against it. changes in culture and society surely affected political life. lincoln hoped to bring the north and south together after the war by healing the nationand making people lose their resentment.

hope this you out just took thus test a min go and mad a 100