Learnt how to balance and ride a cycle on my own when I was a kid, and I used to 'run away from home' for 12 hours with other kids, I learnt how to swim after drowning, twice, ate whatever was around, green almonds from trees, grapes from vineyards, but raw corn was painful, I would not advise trying. We tried to hunt with arrows and sometimes used gun powder in a primitive red-loading rifle, but we sucked at it. we got chased by dogs in farms we raided and chased by an armed man who claimed we caused his wife's abortion while we were playing football in the street. Another armed man chased us brandishing his gun after we attacked him with stones after we caught him staring at our neighbor's daughter while she was on the balcony. This was in 1969 to 1973 before we moved to an apartment building and all that ended. Now I joke telling my family that I wish for once the police would call me for something my son has done, but no luck with that:) . Here some photos I wish you could recognize that dude on my shirt https://imgur.com/a/JCFMgap

I don’t think in 1926 more than 50% of global 15-20 year olds could:

“acquire food from nature (farm, hunt, gather) and cook it for themselves.”

Or

“make and fix their own tools. Build and fix their shelter.”

(Culturally, those tasks often specialize by vocation, gender etc.)