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1
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agriculture
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Early civilizations
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Agriculture was central to the development of ancient Mesopotamian, Egyptian, and Indus Valley civilizations.
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1
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2
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city-states
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Early civilizations
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City-states were the foundational political and social structure of early civilizations such as Sumerian and Mesopotamian societies.
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1
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3
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lever
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Early civilizations
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Lever was used as a simple machine for moving heavy objects in early civilizations.
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1
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4
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religious practices
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Early civilizations
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Religious practices were integral to daily life and societal structure in early Mesopotamian and Egyptian civilizations.
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1
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