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In the world of spinners depending on which direction you twist the fibres, it's called either z twist, or s twist. And using the two in combination makes for the world of cordage and fabric we have today.

The next big leap is rather than using cord to sew bits of animal together to make clothes, we tangle bits if thread together in highly specific arrangements to make bigger pieces we can use to make clothes from. The invention of weaving changed humanity.

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