What is The Intelligence Trap: Why Smart People Make Dumb Mistakes about?

The Intelligence Trap is science journalist David Robson's investigation into a paradox: high intelligence and education do not protect against bad reasoning, and can actively make it worse. Robson draws on cognitive psychology, behavioral economics, and biographical research to document how intelligent people — doctors, scientists, politicians, even Nobel laureates — make systematic errors that their intelligence should theoretically prevent. The result is a book about the limits of IQ as a predictor of sound judgment and the distinct skills that actually produce good thinking.

The core claim is that intelligence, as measured by IQ or academic credential, tells you a great deal about a person's cognitive capacity but almost nothing about how they apply it. Robson introduces the concept of "dysrationalia" — rationality failures in intelligent people — and argues that high-IQ individuals often have more elaborate and coherent justifications for their biases than less intelligent people. They are better at constructing post-hoc rationalizations, better at finding evidence that confirms their existing views, and more confident that their reasoning is sound when it isn't. The book cites studies showing that measures of analytical thinking and actively open-minded thinking predict good judgment far better than IQ.

The middle section uses case studies to illustrate these failures. Arthur Conan Doyle's credulous belief in spiritualism. Linus Pauling's aggressive vitamin C advocacy despite weak evidence. The confident wrongness of financial analysts and geopolitical experts whose track records are worse than chance. Each case shows a brilliant person applying their intelligence in service of a prior conclusion rather than toward an open inquiry.

The final section is constructive. Robson explores practices that improve judgment regardless of baseline intelligence: actively open-minded thinking, intellectual humility, the scientific mindset, and techniques drawn from research on "superforecasters" — the small group of amateur forecasters who dramatically outperform experts. The solutions are specific enough to be useful, though readers hoping for a quick fix will find that the underlying habits require sustained practice.