Moral psychologist Jonathan Haidt has become one of America’s leading sources for understanding political polarization. His 2012 bestseller, The Righteous Mind: Why Good People Are Divided by Politics and Religion, presciently described the intensifying polarization that was both a cause and an effect of the Trump presidency. In the end, however, even Haidt’s diagnosis proved too sanguine. In a popular TED Talk that accompanied the 2012 book, Haidt mused that a common threat might restore common ground in American politics. If Americans learned that a large asteroid was on course to strike
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