What do you think are the best sources of evidence as to whether things are getting better or worse for people at various time scales?
Conversation
Replying to
Steven Pinker and Nassim Taleb of course how dare you doubt them
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Serious answer: self-reported answers to whether people would actually use a time machine to go permanently back in time after being given enough uncontroversial historical facts about targeted past.
It would be an interesting survey to design.

