What is the oldest expertise that's been passed down from person to person? Is there a chain for flint-knapping for example?
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Given that coevolution is a slow process and walking wouldn't be key to early hominid babies (carried) but only useful for adults...
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And that it could be easily discovered by any able bodied hominid, I'm not sure it's the right answer. But maybe
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I'm increasingly inclined to think it was just survival knowledge ab local env. what not to eat, where not to wander, local animal calls...
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Indicating specific types of danger, etc. Tools come later. Advanced skills after that
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I think you're on to something here. But it's got to be baser. How about just that knowledge should be shared?
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I think that's part of what I was suggesting. Like plant x = good, plant y = bad. Don't wade into a river unless you have no other option
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Noise x = large predator (that's probably more advanced) but totally a thing lesser primates use
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By noise x I mean like bird call x = large predator. Not the noise of the predator itself. Jungle call warning system. Forget the name of it
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I don't think walking is an expertise: There's no ablebodied adult who doesn't walk. No culture seems to have lost this "skill"
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