I noticed the same thing when I was in high school, or rather the equivalent of it. I have this theory.. In natural environment, what will cause a person to sleep too little? Probably the prospect of danger, knowing there are predators nearby for example. So, lack of sleep puts you in a kind of alert mode. You get a little edgy, pay attention to strange sounds, try to figure out how escape unnoticed, etc. This can turn into paranoia in the long run, but I think this is all just to make sure you will survive in the wild.
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I noticed the same thing when I was in high school, or rather the equivalent of it. I have this theory.. In natural environment, what will cause a person to sleep too little? Probably the prospect of danger, knowing there are predators nearby for example. So, lack of sleep puts you in a kind of alert mode. You get a little edgy, pay attention to strange sounds, try to figure out how escape unnoticed, etc. This can turn into paranoia in the long run, but I think this is all just to make sure you will survive in the wild.