Résumé de Poor Charlie's Almanack

Poor Charlie’s Almanack, edited by Peter Kaufman, is a compilation of Charlie Munger’s speeches, essays, and lectures spanning decades. Although Munger is best known as Warren Buffett’s longtime partner at Berkshire Hathaway, this book presents him as a wide-ranging thinker who draws on psychology, mathematics, biology, and history to explain how to think clearly and invest well. Its central concept is “worldly wisdom,” Munger’s term for a latticework of mental models borrowed from many disciplines. Rather than relying on a single specialty, he argues that gathering big ideas from economics, physics, biology, and psychology produces better judgments. The book’s most famous section is “The Psychology of Human Misjudgment,” in which Munger catalogs roughly two dozen cognitive tendencies—such as incentive-caused bias, social proof, and commitment and consistency—that lead people astray. He illustrates each with anecdotes about business failures, sales tactics, and his own mistakes. Other talks address the importance of inversion (solving problems backward), the value of patience and concentrated bets, and the difference between first- and second-order thinking. The book also includes a biographical sketch of Munger and a collection of his blunt aphorisms and investment principles. Throughout, the emphasis falls on rationality, lifelong learning, intellectual honesty, and avoiding stupidity rather than chasing brilliance. Because Munger’s arguments are grounded in his experiences at Berkshire Hathaway and in specific business cases, the material is concrete rather than abstract. The Almanack has become a standard reference for investors and students of decision-making who want a systematic approach to avoiding error.