Theories of human sleep still seem very speculative. I sometimes wonder if there's some function of sleep that's essential to higher intelligence. And if AGIs would need a similar function? 
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One of the biggest mysteries to me is why some people need much less sleep without apparent adverse effects. Why didn’t evolution select for this trait?
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It seems difficult to evaluate the evolutionary pros and cons of less sleep, b/c there's so little agreement on why we (and so many other animals) need sleep
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total speculation but maybe the vulnerability of individuals while asleep favours intelligent group behaviour, social interdependency. That aside, not needing (deep, vulnerable) sleep sounds v advantageous
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Sleep itself would ostensibly seem to be a severe disadvantage and so less is surely better? But maybe it’s just somehow not as bad as it seems. (Or maybe it’s all more complicated, e.g. “less sleep” trait interferes poorly with certain neurodegenerative condition genes, etc.)
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Seems like there's lots of speculation on this. One interesting theory is that it's related to immune response, eg: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2631508/ …pic.twitter.com/6l54bXd8Sh
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In ancient time, that’s right because at night what could average people do when they didn’t have lights or it was too expensive to have lights on at night. The best thing to do is to sleep. Remember, the needs or conditions to work at night did not emerge ...
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until the first industrial revolution which is less than 300 years to now. Way much time needed for less-sleep people to begin domination in evolution.
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