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I find it hard to imagine many people who naturally feel great with low amounts of sleep will act on the book's advice. I expect it's largely people who already think they don't sleep enough that'd be affected by the books message.
While it's not impossible, I'm not convinced that this book will stop many people from trying sleep deprivation therapy
"When people don’t restrict their food-eating, many...start eating more than they need and become obese...allowing ourselves to get as much food as we want, likely isn’t the healthiest choice. My guess is that same is likely true for sleep."
I'm not convinced by this analogy. I don't think hunter-gatherers regularly struggled with overeating even when food was abundant. Something changed recently about the environments humans live in and the types of food they can access. These changes made over-consumption a problem
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