This month saw the passing of two giants. Not many people in history truly change minds. These two men did.
Kenneth Arrow: Among his many contributions, he proved that majority-voting will always lead to suboptimal results. There are many fine tributes linked here.
Hans Rosling: Among his many contributions, he showed time and again that what we believe about poverty and development is simply and tragically wrong. Tim Harford has a great More or Less podcast tribute. The NYT obit is good too.
May their ideas, influence, and spirits live on.
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