Séan Ó Conghaile ᚛ᚄᚕᚅ᚜: Yep. It was actually the Hadza people (who live in those sized groups), and it only 18 minutes over 22 days and nights that the adults of whole group were all asleep simultaneously. royalsocietypublishing.org/doi/10.1098/...

"we never used to have all these women in their 30s suddenly getting diagnosed with ADHD" listen, I wouldn't have even noticed I have ADHD if I lived in an era where my doctor could ask if I want to lose 5lbs and then hand me enough amphetamines to see the face of God

and when our ancestors slept in trees I bet having a few ppl who stayed up late and were easily distractible by noises made a huge difference with leopards

I read an anthropology article about the !Kung people and their sleeping years ago. Over something like 5 days, there were only 11 minutes when everyone in the village was asleep. We all have our places in the world, just not necessarily in an industrial society

I hadn't seen that, but it fits well with my theory about morning people, night people, and people like me with bifurcated sleep patterns. If you live in an extended family group of 20, including small children, it works better if people are alert at different times.

Yep. It was actually the Hadza people (who live in those sized groups), and it only 18 minutes over 22 days and nights that the adults of whole group were all asleep simultaneously. royalsocietypublishing.org/doi/10.1098/...

Chronotype variation drives night-time sentinel-like behaviour in hunter–gatherers | Proceedings of the Royal Society B: Biological Sciencesroyalsocietypublishing.org Sleep is essential for survival, yet it also represents a time of extreme vulnerability to predation, hostile conspecifics and environmental dangers. To reduce the risks of sleeping, the sentinel hypo...

That's amazing. Also: "Based on injury and infirmed status, three individuals were excluded from analysis; no one was excluded due to insomnia, as no potential subjects reported sleep difficulties." 33 people, and not a single one reports sleep difficulties!

I don't know if it's that paper or another from the same group, but they were talking about the difficulty explaining insomnia to the participants. Neither of the languages they used has a vernacular term for insomnia.

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