Is this the unique 21st century invention?

Oct 16, 2023

∙ Paid

Is there anything today that could not have been invented 1,000 years ago? I used to think not, but I’ve recently changed my mind.

One of my favorite quotes on economic growth comes from Paul Romer, who won a Nobel Prize for his contribution to growth theory. He begins his seminal paper, Endogenous Technological Change, with this:

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