#HowardWainer's "The Most Dangerous Equation"^1s got me to Kelly's Equation. One page^2 linked to Wikipedia's "#HedonicTreadmill"^3. Researchers see Primo Levi's insight too!?
> The process of hedonic adaptation is often conceptualized as a treadmill, since no matter how hard one tries to gain an increase in happiness, one will remain in the same place. [Once their bellies are full]
^1 https://www.americanscientist.org/article/the-most-dangerous-equation
^2 https://theory.stanford.edu/~blynn/pr/kelly.html
^3 https://en.wikipedia.org/wiki/Hedonic_treadmill
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