Genius is often assumed to be a matter of sheer brainpower—but the link between intelligence and creativity turns out to be far messier. From early, dubious attempts to assign IQ scores to historical greats to modern tests that struggle to predict real-world originality, the evidence suggests that high intelligence is neither a guarantee nor a clear definition of genius. In this episode, we explore why divergent-thinking exams fall short, how figures with unremarkable test scores have produced extraordinary work, and what the shifting baseline of intelligence revealed by the Flynn effect tells us about the limits of measurement. The story ultimately asks whether traits like personality, motivation, and persistence matter more than IQ—and whether genius can ever be captured by a number at all.

Robinson, Andrew, 'Intelligence and creativity', Genius: A Very Short Introduction, Very Short Introductions (Oxford, 2011; online edn, Oxford Academic, 24 Sept. 2013), https://doi.org/10.1093/actrade/9780199594405.003.0004