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What is the social order of the ancient river valley civilization of mesopotamia?

What are the most populous and least areas of russia and why are some areas more heavily populated than others

How does the principle of federalism affect the u.s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d.it divides the federal and state governments into three branches