Philip Tetlock – Author Biography
Philip Tetlock is the psychologist whose research on expert judgment — most famously the finding that political pundits are barely better than chance at forecasting — reshaped how we think about prediction, expertise, and decision-making. His book Superforecasting became a bestseller and a manual for better thinking under uncertainty.
Early Life
Philip E. Tetlock was born on March 2, 1954, in Toronto, Canada. He earned his bachelor’s and master’s degrees from the University of British Columbia and his PhD in psychology from Yale University in 1979. He taught at UC Berkeley and Ohio State before joining the University of Pennsylvania, where he is the Annenberg University Professor.
Career
In the 1980s and 1990s, Tetlock conducted a landmark two-decade study tracking the predictions of 284 political and economic experts — collecting over 82,000 forecasts. The result, published in Expert Political Judgment: How Good Is It? How Can We Know? (2005), was devastating: experts performed barely better than dart-throwing monkeys, and the most famous experts were the worst forecasters. He distinguished “hedgehogs” (ideologues who force everything into one big theory) from “foxes” (eclectic thinkers who know many things and update their views). He then co-founded the Good Judgment Project, which beat professional intelligence analysts in a U.S. government forecasting tournament, and wrote Superforecasting: The Art and Science of Prediction (2015) with Dan Gardner, identifying the habits of the best amateur predictors.
Major Works
Tetlock’s defining books are Expert Political Judgment: How Good Is It? How Can We Know? (2005) and Superforecasting: The Art and Science of Prediction (2015, with Dan Gardner).
Writing Style and Themes
Tetlock writes as a scientist with a polemicist’s edge — his work is rigorous, data-driven, and quietly devastating to conventional wisdom. His great theme is accountability: that experts should be scored on their predictions the way weather forecasters are, and that the pundit-industrial complex rewards confidence over accuracy. His practical message is hopeful: forecasting is a skill, not a gift, and ordinary people can learn it through probabilistic thinking, updating on evidence, and breaking problems into parts. He practices what he preaches, running forecasting tournaments that put his theories to the test.
Legacy
Tetlock’s hedgehog-versus-fox distinction entered the intellectual vocabulary, and Superforecasting became essential reading in intelligence agencies, finance, and tech. His work underpins the modern “rationalist” movement’s emphasis on calibration and prediction markets. He proved that the emperor of expertise often has no clothes — and showed how to dress better.
