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Change is slowing down, at least in developed countries. A person from the US of 2020 would fit in right in 1970, and be able to adapt to 1920, but be lost in 1870. A person from 1970 would adapt a little quicker to 1920, but be almost as lost as us in 1870.

But someone from 1870 could easily adapt to any time going back through the 17th century. I don't see how that's evidence of change slowing down, it's rapidly accelerating.

I would guess the parent comment wouldn’t disagree that it had sped up til about 1950 or 1970. But then it has slowed down since. I tend to agree, and that this whole personal computers, web apps, tracking stuff that’s obsessed over here just isn’t that big of deal compared to refrigeration and easy global transportation (to pick 2 from 1850-1950).

Easy global transport is much more recent than 1950. My grantparents came to Australia by boat in the 1950s, and didn't expect to see their family ever again. Nowadays the flight to Europe is hard, as far as contemporary transport goes, but many professionals could afford to visit annually without any great risk. That's a world changing difference.

This is the exact curve that is described by an academic in a recent episode of planet money https://pca.st/episode/d1397f9e-49f0-425c-8b10-3c4adb039f3f

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