There's also the Midnight in Paris theorem (https://en.wikipedia.org/wiki/Midnight_in_Paris https://en.wikipedia.org/wiki/Midnight_in_Paris) where everyone's id

There's also the Midnight in Paris theorem (https://en.wikipedia.org/wiki/Midnight_in_Paris https://en.wikipedia.org/wiki/Midnight_in_Paris) where everyone's idea of a golden-age in Paris is someone else's least favourite, and the true golden-age was actually an earlier era... > The 70" were nice but the 80" were horrible economically speaking. That's basically how it went for many countries in the Western world. The 1970s weren't bad, but the 1980s saw income inequality start to spike completely out of control. Income for the average person stagnated, and in all honestly has never really recovered. France is a peculiar institution with a wild, tangled history, but it's not immune to global trends.