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Define: The most advanced stage of human social development and organization.
Summary: An example of a complex institution would be a government.

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Define: Technology that is getting better and better over time.
Summary: Over time the people started making stronger weapons with sharper points and used metal instead of stone.

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Define: The activity or skill of marking coherent words on paper and composing text.
Summary: The symbols on the tablets are a form of writing and was how they kept documents.

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Define: The use of new tools, inventions and techniques for practical purposes.
Summary: Over time weapons and tools and furniture became more advanced.

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Define: Someone who is an expert in a certain job.
Summary: When there were to many crops people started to do other things. The people started to make things with metal like weapons and tools.