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Period: 5300 BCE to 3500 BCE
First State gradually developed
The first city-states gradually develop in southern Mesopotamia. This is the achievement of the Sumerian people. -
3500 BCE
Writing began to developed
Writing begins to be developed. At first this is based on pictograms, and takes about a thousand years to evolve into a full cuneiform script. -
2300 BCE
First Empire in world History
King Sargon of Akkad starts conquering the first empire in world history. The empire reaches its height in 2220 BCE.