What major invention of the Sumerians had a large impact of the forming of the first civilization?

And What are the 5 civilizations of Mesopotamia?
What made Mesopotamia successful?

What made Mesopotamia successful?

What does Mesopotamia mean?

List a few examples of city-states that practiced oligarchy in ancient greece

Which of the following is a likely reason that someone today might decide to move from a city in the midwest to the south? a. the decline of manufacturing in the midwest b. the many high tech jobs available in the south c. urban overcrowding in the midwest d. higher housing costs in the south

Who was the top of the feudal system hierarchy