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Was the Stone Age the Stone Age for all civilisations ? What if....it just was not ?

If ETs came on earth today and were presented a bunch of Amazonian tribes..would they declare Earth in the Stone Age ?
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ElRengo · 70-79, M
"Was the Stone Age the Stone Age for all civilisations ? What if....it just was not ?"

Between certain limits, it was far from homogeneous.
While most of the world was barely populated by hunter gatherers, threre was agriculture, math and literature in what is now called the "South Arc" (includding Sumer).
revenant · F
@ElRengo yes