Weaving was essential to move away from a hunter gatherer lifestyle to a settled farming one. It was also necessary for population to grew. It's a lot simpler to farm a field of linen, or to collect fleece from live sheep, than to have to kill an animal each time you needed a new jacket. That's not to say the process of producing fibre from plants is easy. To find a gootube video in how to make linen from flax plants. It's many stages. Laborious and complicated.
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