“Americans have reached a point where ignorance, especially of anything related to public policy, is an actual virtue,” Tom Nichols would write in the preface to The Death of Expertise: The Campaign Against Expertise and Why It Matters, which was published by Oxford last year and quickly became a bestseller. “To reject the advice of experts is to assert autonomy, a way for Americans to insulate their increasingly fragile egos from ever being told they’re wrong about anything.” Further down the page, he would add: “I’m worried.”