The Undoing Project

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The Undoing Project
A Friendship That Changed Our Minds
Front cover
AuthorMichael Lewis
CountryUnited States
PublisherW. W. Norton & Company
Publication date
December 6, 2016
Media typePrint (Hardcover), Audiobook
ISBN978-0-393-25459-4 (Hardcover)
Preceded byFlash Boys 

The Undoing Project: A Friendship That Changed Our Minds is a 2016 nonfiction book by American author Michael Lewis, published by W.W. Norton. The Undoing Project explores the close partnership of Israeli psychologists Daniel Kahneman and Amos Tversky, whose work on heuristics in judgment and decision-making demonstrated common errors of the human psyche, and how that partnership eventually broke apart. The book revisits Lewis' interest in market inefficiencies, previously explored in his books Moneyball (2003), The Big Short (2010), and Flash Boys (2014). It was acclaimed by book critics.[1]


According to the review aggregator Bookmarks, The Undoing Project was met largely by rave reviews,[2] with Glenn C. Altschuler arguing in the Pittsburgh Post-Gazette that it "may well be his best book."[3] Writing in The New Yorker, law professor Cass Sunstein and economist Richard Thaler praised the book's ability to explain complex concepts to lay readers as well as turn the biographies of Tversky and Kahneman into a page-turner: "He provides a basic primer on the research of Kahneman and Tversky, but almost in passing; what is of interest here is the collaboration between two scientists."[4] Jennifer Senior of The New York Times wrote that "At its peak, the book combines intellectual rigor with complex portraiture. During its final pages, I was blinking back tears, hardly your typical reaction to a book about a pair of academic psychologists."[5]


  1. ^ "How Two Trailblazing Psychologists Turned the World of Decision Science Upside Down". Vanity Fair. 2016-11-14. Retrieved 2023-11-04.
  2. ^ "Bookmarks reviews of The Undoing Project by Michael Lewis". LitHub. Retrieved February 8, 2017.
  3. ^ Altschuler, Glenn C. (January 15, 2017). "'The Undoing Project': How two Israeli psychologists changed the world". Pittsburgh Post-Gazette. Retrieved February 8, 2017.
  4. ^ Cass Sustein and Richard Thaler (December 7, 2016). "The Two Friends Who Changed How We Think About How We Think". The New Yorker. Retrieved February 10, 2017.
  5. ^ Jennifer Senior (December 1, 2016). "Michael Lewis on Two Well Matched (but Finally Mismatched) Men". The New York Times. Retrieved February 10, 2017.