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You could move a person back and forth hundreds of years and they would get along in the world pretty well.

Almost like it was a sustainable, albeit very different, way of living?

The time we live in now is pretty special, you just have to look at graphs of life expectancy, pollution, population, industrial output etc.

Only one and a bit of those 4 measures are a positive kind of special though?

If you look at a large enough time frame then of course nothing matters

Agreed.