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They each had a sophisticated form of writing. They each had massive architectural and scientific achievements. They each had a practical use astronomy and mathematics. Each empire relied on a hierarchical social system with a powerful leader at the top followed by his subordinates and then commoners. Each relied on trade and conquest to expand their empires.

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ALL THE ABOVE HAD SOME OF THE OLDEST CIVILIZATIONS IN THE WORLD.

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16y ago
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river valleys

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12y ago
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Q: What did Mesopotamia Egypt India and China have in common?
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