Judea Pearl

Judea Pearl was born on September 4, 1936, in Tel Aviv and grew up in Bnei Brak, a Biblical town his grandfather went to reestablish in 1924.⁠[1]

He came from a Jewish family from Poland and credits his interest in science to the “great scientists” who had fled Nazi Germany and taught his generation.⁠[2]

He recalled moving from a religious environment to a secular one, serving in a special army unit that combined farm work with military duties and living on a secular kibbutz; bored by the farm work, he decided to leave the kibbutz and applied to the Technion to study engineering.⁠[3]

In 1960 he moved to the United States, arriving with just $56; to cover his graduate tuition, he worked on computer memory at the RCA David Sarnoff Research Laboratories in Princeton, New Jersey.⁠[2]

In 1965 he received a master’s degree in physics from Rutgers University and, in the same year, a PhD in electrical engineering from the Polytechnic Institute of Brooklyn.⁠[4]

He met his wife, the software developer Ruth Pearl, at the Technion. In the mid-1960s the couple moved to California, where she worked at TRW and he at Electronic Memories.⁠[3]

In 1969 he joined the faculty of the University of California, Los Angeles (UCLA), initially in Engineering Systems; his own résumé gives 1970 as the year he joined.⁠[1]

Published in 1984, Heuristics: Intelligent Search Strategies for Computer Problem Solving dealt with heuristic algorithms—methods for quickly finding a good-enough answer rather than searching forever for a perfect one—and suggested ways to achieve a higher standard of success.⁠[4]

In 1985 he coined the term “Bayesian network,” named for the 18th-century English mathematician Thomas Bayes, and developed theoretical foundations for reasoning under uncertainty; such networks provided a compact way of representing probability distributions and reasoning about them.⁠[5]

Published in 1988, Probabilistic Reasoning in Intelligent Systems: Networks of Plausible Inference developed Bayesian networks for representing and reasoning efficiently with large amounts of uncertain evidence, an approach since used in fields from medical diagnosis to email spam detection.⁠[6]

In 1995 he was elected to the National Academy of Engineering; he had become an IEEE Fellow in 1988 and an AAAI Fellow in 1990, and in 1999 he received the IJCAI Research Excellence Award in Artificial Intelligence.⁠[7]

In 2000 he published Causality: Models, Reasoning, and Inference with Cambridge University Press; a second edition followed in 2009.⁠[8]

The book won the London School of EconomicsLondon School of Economics and Political ScienceThe London School of Economics and Political Science (LSE) is a specialist social science university in central London, founded in 1895 by members of the Fabian Society. It is known for research in economics, politics and social policy, and its alumni and staff include many Nobel laureates and national leaders.Open the full entry Lakatos Award.⁠[9]

In 2002 his son, Wall Street JournalThe Wall Street JournalThe Wall Street Journal is a U.S. news publication founded in 1889, with a focus on business, finance and economics. It is published by Dow Jones, part of News Corp.Open the full entry reporter Daniel Pearl, was kidnapped and killed by radical extremists in Pakistan. That year Daniel’s parents, Judea and Ruth Pearl, founded the Daniel Pearl Foundation to promote the principles central to their son’s life and work—pluralism, cross-cultural understanding and respect—with Judea Pearl as its president.⁠[10]

Since 2002 the foundation has run an annual Daniel Pearl Memorial Lecture at UCLA, since 2006 a lecture series at Stanford UniversityStanford UniversityStanford University is a research university in California founded by Leland and Jane Stanford in 1885 and opened in 1891.Open the full entry, and Daniel Pearl World Music Days concerts around the world.⁠[11]

Starting in 2003, he and Akbar S. Ahmed, a scholar of Islam at American University, held a series of public discussions before multifaith audiences as part of the Daniel Pearl Dialogue for Muslim-Jewish Understanding.⁠[12]

He received the 2008 Benjamin Franklin Medal in Computer and Cognitive Science for creating algorithms to compute and reason given only uncertain evidence; the medal was presented on April 17 at the Franklin Institute in Philadelphia.⁠[6]

In May 2010 a bipartisan bill named for Daniel Pearl, instructing the State Department to follow and report violations of press freedom around the world, was signed into law by President Barack Obama; the Pearl family attended the White House signing ceremony.⁠[12]

In August 2010 the Cognitive Science Society announced that he had won the Rumelhart Prize, which carries $100,000. He said the inspiration for his work came from cognitive science and from the 1970s papers of David Rumelhart.⁠[13]

In December 2011 the Technion announced that he and Richard Friend had won the 2011 Harvey Prize, recognizing him for laying the theoretical foundations for knowledge representation and reasoning in computer science; the prizes were to be presented in spring 2012.⁠[14]

In 2012 he was elected to the American Academy of Arts and Sciences.⁠[15]

On March 15, 2012, ACM named him the winner of the 2011 A.M. Turing Award, which carried a $250,000 prize, for his pioneering work in probabilistic and causal reasoning.⁠[5]

In 2014 he was elected to the National Academy of Sciences, one of 84 new members that year, for his “distinguished and continuing achievements in original research.”⁠[15]

In 2016 he co-wrote Causal Inference in Statistics: A Primer with Madelyn Glymour and Nicholas P. Jewell.⁠[16]

Around 2018 he was Chancellor’s professor of computer science and statistics at UCLA and a distinguished visiting professor at the Technion, and directed UCLA’s Cognitive Systems Laboratory, where he conducted research in artificial intelligence, human cognition and the philosophy of science.⁠[9]

On May 15, 2018, The Book of Why: The New Science of Cause and Effect, written with Dana Mackenzie, was published in New York by Basic Books.⁠[17]

Discussing the book, he said deep learning remained stuck at the level of associations—“All the impressive achievements of deep learning amount to just curve fitting”—and argued for replacing reasoning by association with causal reasoning so that machines could ask counterfactual questions.⁠[18]

On December 11, 2019, he appeared on Lex FridmanLex FridmanLex Fridman is a Soviet-born, US-raised computer scientist and podcast host who works as an MIT research scientist on human-AI interaction and autonomous driving. His Lex Fridman Podcast is known for hours-long conversations with guests including heads of state and technology leaders.Open the full entry’s podcast, discussing Descartes and analytic geometry, free will and probability, causal networks, the do(x) operator, counterfactuals, human-level AI and concerns about AGI, religion, and his son Daniel Pearl.⁠[19]

On February 9, 2022, the BBVA Foundation announced that he had won the fourteenth Frontiers of Knowledge Award in Information and Communication Technologies for laying the foundations of modern artificial intelligence. Nominator Daniel Kahneman, a Nobel laureate in economics, said he had never encountered a scholar who evoked as much reverence and affection as Pearl.⁠[20]

In an August 2024 preface to the French edition of The Book of Why, he argued that large language models such as ChatGPT and GPT-4 circumvent the limits of the Ladder of Causation by training on texts written by authors who already have causal models of the world, but that their solutions only give the impression of having a causal model; he gave reasons why human-like causal models remain indispensable in the era of LLMs.⁠[21]

On May 20, 2025, UCLA announced his election as a Foreign Member of the Royal Society for his fundamental contributions to artificial intelligence, particularly causal reasoning; by then he had received six honorary doctorates and his publications had been cited more than 150,000 times.⁠[22]

In December 2025 he published Coexistence and Other Fighting Words: Selected Writings of Judea Pearl 2002–2025, a collection of his writings, prompted by his son’s killing, on hate, the Arab-Israeli conflict, the story of Israel and antisemitism.⁠[23]

The book was published by Political Animal Press.⁠[7]

On February 25, 2026, at Stanford University’s annual Daniel Pearl Memorial Lecture, he discussed his new book, used the term “Zionophobia” to distinguish opposition to Jewish sovereignty from traditional antisemitism, and endorsed a two-state solution on the condition of “two states for two peoples, equally legitimate and equally indigenous.”⁠[24]

Personal website: Public link: https://bayes.cs.ucla.edu/home.htm (opens in a new window)⁠[25]

X: Public account: https://x.com/yudapearl (opens in a new window)⁠[2]

Daniel Pearl Foundation: Official website: https://www.danielpearl.org/ (opens in a new window)⁠[11]