I wouldn't always have to be the top that walks backwards when I help someone carry a mattress anymore
So the world would be pretty different
One of my esoteric experiences was not sleeping, I made the experience for three days and recorded alot of behaviour and perception. I was better at reading and thinking, no hallucinations, but I was enjoying less until it was boring. Conclusion sleep is like a meal that you need even if you're not tired, something like a vitamin. Biologically and medically record : nothing cz I don't have a lab.
It would be 24h madness.
Humans would be very different. We need sleep because of our nature vis a vis the nature of the world. So it depends on how our nature would be different such that we didn't need sleep. It would have to be something very radical, considering all animals sleep. And we'd probably not not nearly as interesting because we'd be less alive/conscious. Fully living beings need regular breaks from the harshness of physical life. Since we'd be less alive (if it would be possible at all--that's the only way I can imagine it), we probably wouldn't have been smart enough to dominate and decimate the natural world, so the world would be very different, more like it was a hundred thousand years ago.
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