Humans just barely survived during most of our history.
Then a warming of the climate made agriculture possible, which lead to a surplus of food that could be used to feed people who were doing something other than gathering food.
Those people invented writing and that made real technological progress possible for the first time.
But why didn’t it start 20,000 years ago
It did, we were just in the boring part of the exponential curve where it’s basically flat
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Cause no steam engines or copper wires or antibiotics. Hadn’t even invented metalworking afaik.
They should have just googled it
why hadn’t they invented bootstraps to pick themselves up by.
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Humans just barely survived during most of our history.
Then a warming of the climate made agriculture possible, which lead to a surplus of food that could be used to feed people who were doing something other than gathering food.
Those people invented writing and that made real technological progress possible for the first time.
Evolution.