The people who first invented tools had to invent inventing tools without tools.
The people who first invented tools had to invent inventing tools without tools.
The people who first invented tools had to invent inventing tools without tools.
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First tool: a rock someone found
Second tool: that same rock someone else found. But it's mine now.
Third tool: I copied that rock then took that rock with my rock. Now I have two of them.
Fourth tool: I make hundreds of tiny identical little pebbles and start handing them out to people to reward them for behavior that I agree with. Soon after, the tribe is divided into people with the little pebbles and people without.