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https://drive.google.com/file/d/0B_rfR4Ju0P78d0R3aFhvLVVyQ0E/view

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First, city-states were ruled by priests. Then city-states expanded and came into conflict with one another. As a result, the cities were ruled by kings.

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https://drive.google.com/file/d/0BxZW4bHe0OlMRC00RzZtcTkxdnc/view

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Over time Sumerians were able to improve writing and today the language is known as  Cuneiform. There was other languages, the Maya created a writing system called Mesoamerica. At first people were making pictographs which were symbols that represented words, but they started to develop alphabets with letters in them.

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To keep tracks of things the Sumerians created writing. The way Sumerians wrote and drew these things is by pressing wedge-shaped stones in to clay. But by 3000 B.C. they developed a system of writing that could record a few other things like numbers and letters. It became so big that they trained Scribes, those are people that are trained write.

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In Sumerian societies  they developed ways of living. One thing was Religion. People had different beliefs and priest were really high in rank. They also created a writing systems to record things.

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One technique was irrigation. Irrigation is a  new system for watering crops. Another technique was the plow, which was a new way for preparing the soil for planting crops.