Is the advice from The Richest Man in Babylon, published in 1926, out of date?
* https://en.wikipedia.org/wiki/The_Richest_Man_in_Babylon
Avoiding greed, envy, the hedonic treadmill, etc, will never not be good advice.
* https://en.wikipedia.org/wiki/The_Richest_Man_in_Babylon
Avoiding greed, envy, the hedonic treadmill, etc, will never not be good advice.
https://en.wikipedia.org/wiki/Ishida_Baigan
Two civilizations re-deriving the same short list from scratch is about the strongest version of your point — "outdated" just isn't the right axis for it.