Why can’t we fall asleep on command?
I seem to hear from a variety of people that they struggle to fall asleep at night; but the difficult to fall asleep sounds like an evolutionary downside. Even as hunter-gatherers, being able to sleep whenever and wherever sounds like it would be an advantage.
Is it a recent product of modern times and people didn’t actually struggle with it a while back? In which case, what of modern life is causing this? If not, what is the evolutionary advantage of not falling asleep easily?
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I would imagine our hunter gatherer ancestors had a far easier time falling asleep given their activity level during the day, their diet, and their lack of artificial lighting (particularly blue light).
That blue light thing is pseudo-science. Bodily activity though, yup, that's a big one.
You got a source for that?