How did the physical geography of sumer leave its cities unprotected

there were no natural geographic barriers in the plains of Sumer.

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

the answer is mass marketing.