THE DEATH OF EXPERTISE

The Campaign Against Established Knowledge and Why It Matters

By Tom Nichols

252 pages. Oxford University Press. $24.95.

Donald J. Trump’s taste for advisers with little or no government experience; his selection of cabinet members like Scott Pruitt and Rick Perry, who have expressed outright hostility to the agencies they now oversee; and the slow pace of making senior-level appointments in high-profile departments like State, Treasury and Homeland Security — all speak to the new president’s disregard for policy expertise and knowledge, just as his own election victory underscores many voters’ scorn for experience.

This is part of a larger wave of anti-rationalism that has been accelerating for years — manifested in the growing ascendance of emotion over reason in public debates, the blurring of lines among fact and opinion and lies, and denialism in the face of scientific findings about climate change and vaccination.

“Americans have reached a point where ignorance, especially of anything related to public policy, is an actual virtue,” the scholar Tom Nichols writes in his timely new book, “The Death of Expertise.” “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. It is a new Declaration of Independence: No longer do we hold these truths to be self-evident, we hold all truths to be self-evident, even the ones that aren’t true. All things are knowable and every opinion on any subject is as good as any other.”