"Sumerian city-states fought each other" would be the best option from the list, since this internal division led to a collapse of power that left people without protection or a solid economy.
I believe the answer is: Sumerian rulers fought to gain territory
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Because of the conflict that happened between sumerian rulers, The territory of the Sumerian empire started to be divided/separated into smaller empires. This make it much more easier for opposing empire or barbarian to conquer them and pick them apart, which lead to the decline of Sumer civilizations.
All of the ideas in the bill of rights are ideas that should not be taken away from any one person, and as long as they are a U.S citizen, should have.
