Razib Khan's Unsupervised Learning

On this episode of Unsupervised Learning Razib talks to Aaron Renn. Renn is a writer, consultant, and urban analyst known for his work on the challenges facing American cities and religious institutions in the 21st century. He is a contributor to The American Reformer and the author of Life in the Negative World, a book exploring the cultural shifts regarding Christianity in America. Renn previously served as a Senior Fellow at the Manhattan Institute for five years and as a contributing editor for City Journal, having established his voice on urban policy through his widely cited blog, The Urbanophile. Prior to hi...

On this episode of Unsupervised Learning Razib talks to Daniel Tabin, a 5th-year Ph.D. student in David Reich's lab in the Department of Human Evolutionary Biology. His research focuses on using ancient and modern DNA to answer questions about human history. Tabin completed a degree in Computer Science and Math and Master's in Computer Science from Rensselaer Polytechnic Institute. He Ph.D. project involves the population genetic history of Central and East Asia.

First, Razib and Tabin discuss a recent paper he co-authored that looks at problematic results in the paleogenetic literature due to contamination and DNA da...

On this episode of Unsupervised Learning Razib talks to Peter Nimitz about the rise of the Slavs. His Substack, titled Nemets, explores world history through the lenses of archaeology, paleogenetics, and historical processes. His writing focuses on "deep history," such as the Bronze Age Collapse and the migration of Indo-European peoples, while connecting these ancient shifts to broader patterns of civilizational rise and fall. Nimitz often integrates technical data from genetics and climate science to challenge traditional narratives about nomadic tribes and early state formations across Eurasia. Beyond antiquity, the newsletter also touches on modern geopolitical developments and regional studie...

On this episode Razib talks to Jesse Arm, VP of external affairs at the Manhattan Institute. His writing and commentary have appeared in the New York Times, Wall Street Journal, The Atlantic, New York Post, Fox News, City Journal and Jerusalem Post. Arm graduated with honors from the University of Michigan, where he majored in international political economy, and studied language and international affairs at Tel Aviv University. He has also worked for Senator Tom Cotton and Representative Dan Benishek, and the analytics arm of American Continental Group, a major lobbying firm.

Razib and Arm discuss the perceptio...

On this episode of Unsupervised Learning, Razib talks to Davide Piffer, whose Substack examines genetic differences between populations. Piffer has been publishing on human genetic variation for a decade, and recently started a Substack, Piffer Pilfer, exploring similar issues in detail over a series of posts.

Razib asks Piffer about the difficulties in analyzing polygenic scores from quantitative traits in ancient DNA samples. How does he do in technical terms, from genome quality to imputation to ancient populations from modern ones? Then, they discuss some of Piffer's findings, in particular, his work on pigmentation. Piffer talks about how he...

Today Razib talks to Aneil Mallavarapu, a scientist and technology leader based in Austin, Texas, whose career bridges the fields of biochemistry, systems biology, and software engineering. He earned his doctorate in Biochemistry and Cell Biology from the University of California, and has held academic positions at Harvard Medical School, where he contributed to the Department of Systems Biology and developed the "Little b" programming language. Mallavarapu has transitioned from academic research into the tech and venture capital sectors, co-founding ventures such as Precise.ly and DeepDialog, and currently serving as a Managing Partner at Humain Ventures. He remains ac...

On this episode Razib, talks to Richard Hanania, a returning guest to the podcast. Hanania holds a Ph.D. from UCLA, a J.D. from the University of Chicago, and an undergraduate degree from CU Boulder in linguistics. He is a regular contributor to the Boston Globe and UnHerd, and has his own newsletter. Hanania is also the author of The Origins of Woke: Civil Rights Law, Corporate America, and the Triumph of Identity Politics.

Razib and Hanania talk about his new book Kakistocracy: Why Populism Ends in Disaster, and his developing views on populism and immigration. They highli...

On this episode, Razib talks to returning guest, Francis Young, a historian who teaches at Oxford. Young specialises in the history of religion and belief from ancient times to the present day, and provides expert indexes for academic books and translates medieval and early modern Latin. He holds a PhD from Cambridge University and is the author, editor or co-author of over 20 books. On his last visit to the podcast, he discussed his book Pagans in the Early Modern Baltic, an account of the practices and persistence of Baltic paganism down to the 16th-century, the age of the Renaissance and R...

On this episode of Unsupervised Learning, Razib again talks to George Washington University archaeologist Eric Cline. The author of 1177 B.C. - The Year Civilization Collapsed and After 1177 B.C. - The Survival of Civilizations, Cline has a new book out, Love, War, and Diplomacy: The Discovery of the Amarna Letters and the Bronze Age World They Revealed. While 1177 B.C. closed with the end of the first global civilization, that of the Eastern Mediterranean at the end of the Bronze Age, and After 1177 B.C. tells the story of those who picked up the pieces, Love, War, and Diplomacy puts...

On this episode of Unsupervised Learning Razib talks again with Washington Post columnist and repeat guest Shadi Hamid (listen to previous episodes). A native Pennsylvanian of Egyptian ethnic background and Islamic faith, Hamid completed his Ph.D. in politics at Oxford University. He is co-host of the Wisdom of Crowds podcast and website with Damir Marusic, and now the author of his own Substack and a recent book, The Case For American Power. Hamid is also the author of The Problem of Democracy: America, the Middle East, and the Rise and Fall of an Idea. , Temptations of Power: Islamists...

On this episode, Razib talks to Vishal Ganesan and Anang Mittal, two Indian-American Hindus who have been thinking about the role of their faith in the present, and past, of the American social landscape. Ganesan is a California-based attorney and writer who focuses on the history, identity, and representation of the Hindu diaspora in the United States. He is best known for his project "Hindoo History" and his writing on the "Frontier Dharma" platform, which attempts to conceptualize what an American, as opposed to Indian, "Hinduism" might look like. Anang Mittal is a DC-based political communications professional who recently worke...

On this very special episode, Razib talks to paleoanthroplogists John Hawks and Chris Stringer. Hawks is a paleoanthropologist who has been a researcher and commentator in human evolutionary biology and paleoanthropology for over two decades. With a widely read weblog (now on Substack), a book on Homo naledi, and highly cited scientific papers, Hawks is an essential voice in understanding the origins of our species. He graduated from Kansas State University in 1994 with degrees in French, English, and Anthropology, and received both his M.A. and Ph.D. in Anthropology from the University of Michigan, where he studied under Milford...

Today Razib talks to Sean Trende. He is a prominent American political analyst who currently serves as the Senior Elections Analyst for RealClearPolitics, a position he has held since 2010. He is also a Fellow at the American Enterprise Institute (AEI) and a lecturer at The Ohio State University, where he earned his Ph.D. in political science in 2023. Before transitioning to full-time political analysis, Trende practiced law for eight years at firms including Kirkland & Ellis LLP and Hunton & Williams LLP, holding a J.D. and M.A. from Duke University and a B.A. from Yale University. Known for hi...

This week on the Unsupervised Learning Podcast, Razib talks to returning guest Alex Young of UCLA and Herasight. Trained originally as a mathematician, Young studied statistics and computational biology at the University of Cambridge before doing a doctorate in genomic medicine and statistics at the Wellcome Trust Centre for Human Genetics, University of Oxford, under Peter Donnelly. He also worked at deCODE Genetics in Reykjavik and at Oxford with Augustine Kong, developing methods in quantitative and population genetics.

Razib and Young talk extensively about what we know about heritability and genomics in 2025, four years after their first conver...

Today on Unsupervised Learning Razib talks to Zineb Riboua, a research fellow and program manager of Hudson Institute's Center for Peace and Security in the Middle East. She specializes in Chinese and Russian involvement in the Middle East, the Sahel, and North Africa, great power competition in the region, and Israeli-Arab relations. Riboua's pieces and commentary have appeared in the Wall Street Journal, Foreign Policy, the National Interest, the Jerusalem Post and Tablet among other outlets. She holds a master's of public policy from the McCourt School of Public Policy at Georgetown University. She did her undergraduate studies in France, wh...

Today Razib talks to Ed West, a British journalist and author. He has served as deputy editor of UnHerd and The Catholic Herald, and has written columns for The Spectator and The Daily Telegraph. He runs the Substack newsletter Wrong Side of History, where he explores culture, politics, and the longue durée of Western history. West is the author of books including Small Men on the Wrong Side of History and The Diversity Illusion, as well as popular-history titles such as 1066 and Before All That.

A previous podcast guest, West and Razib revisit the topic of British decli...

Today Razib talks to Noah Smith, an American economist-turned-blogger known for his commentary on economics and public policy. His blog, Noahpinion, is one of the most popular on Substack. He earned a PhD in economics at University of Michigan and served as an assistant professor of finance at Stony Brook  University before leaving academia to become a full-time writer. He wrote a column for Bloomberg until 2021, when he turned his focus entirely to independent writing and his Substack newsletter. Smith is based out of San Francisco but spends part of the year in Japan. An enthusiast for Japanese culture, he is also...

Today, Razib talks to Coltan Scrivner, a behavioral scientist, horror entertainment producer, and author, whose work centers on the psychological and evolutionary roots of our fascination with darkness, horror, and true crime. He is affiliated with the Department of Psychology at Arizona State University. Scrivner also serves as the executive director of the Nightmare in the Ozarks Film Festival and founded the Eureka Springs Zombie Crawl. He has been featured in The New York Times, CNN, The Wall Street Journal, NPR, TIME Magazine, National Geographic, Scientific American and Forbes. He is the author of Morbidly Curious: A Scientist Explains Why We Can't...

Today Razib talks to Nate Soares the President of the Machine Intelligence Research Institute (MIRI). He joined MIRI in 2014 and has since authored many of its core technical agendas, including foundational documents like Agent Foundations for Aligning Superintelligence with Human Interests. Prior to his work in AI research, Soares worked as a software engineer at Google. He holds a B.S. in computer science and economics from George Washington University.

On this episode they discuss his new book, If Anyone Builds It, Everyone Dies: Why Superhuman AI Would Kill Us All, co-authored with Eliezer Yudkowsky. Soares and Yu...

On this episode of Unsupervised Learning, Razib talks to Alexander Cortes. Cortes is a trainer, fitness influencer and entrepreneur. He is the co-founder, along with his wife, of Ferta, a company that aims to "optimize your reproductive health and conceive naturally." Born and raised in California, Cortes began his career in the fitness industry as a personal trainer in 2010. Over the next few years he expanded his efforts online, writing about fitness and nutrition from a science-informed perspective. Cortes developed a following by offering practical advice on strength training, muscle building, and the psychological aspects of fitness to the inte...

Today on Unsupervised Learning, Razib talks to Kat Rosenfield. She is an American novelist, journalist, and culture critic known for both her fiction and commentary on contemporary political debates. She began her career in publishing and as a reporter for MTV News before branching out into broader cultural criticism, contributing to outlets such as The New York Times, Wired, Vulture, Reason, and UnHerd. As a novelist, she has written You Must Remember This (2023), No One Will Miss Her (2021), Inland (2014) and Amelia Anne Is Dead and Gone (2012). Rosenfield also co-authored the New York Times bestselling A Trick of Light (2019) with Stan Lee. She is cur...

Today Razib talks to Eric Kaufmann, a Canadian professor of politics at the University of Buckingham, where he directs the Centre for Heterodox Social Science. He earned his BA from the University of Western Ontario and his MA and PhD from the London School of Economics. Prior to his current role, he held positions at the University of Southampton and Birkbeck, University of London, which he left in October 2023. He is the author of several books, including Whiteshift: Immigration, Populism and the Future of White Majorities, Shall the Religious Inherit the Earth?, and The Third Awokening. His research interests inclu...

Today Razib talks to Ryan P. Williams. He is president of The Claremont Institute, a position he has held since 2017. He is also a contributor to The Claremont Review of Books and started The American Mind. Williams earned a B.A. in political science and Economics from Hillsdale College and an M.A. in politics from Claremont Graduate University. He has taught American politics and political philosophy as an adjunct professor at California State University, San Bernardino and Cal Poly Pomona.

Razib and Williams first discuss the origins of The Claremont Institute and the influence of Harry Jaffa on th...

Chad Orzel is a physicist and science writer who has been blogging for nearly twenty-five years. He's the author of four books, Breakfast with Einstein: The Exotic Physics of Everyday Objects, How to Teach Quantum Physics to Your Dog, How to Teach Relativity to Your Dog, Eureka: Discovering Your Inner Scientist and A Brief History of Timekeeping. The last is a mix of cultural and engineering history, archeology and physics, and reflects Orzel's wide interests as reflected in his Substack, Counting Atoms.

In this episode of Unsupervised Learning Razib surveys the state of physics communication and science, as well as ou...

Recently, the new embryo-selection start-up Herasight has been in the news, finally coming out of stealth. Part of the buzz is because of the public involvement of well-known geneticists and academics like Alex Young and Joe Pickrell in Herasight's algorithm development. Additionally, Noor Siddiqi, the CEO of Orchid, a competitor to Herasight (and onetime advertiser on this podcast), was a guest on Ross Douthat's show Interesting Times, triggering another round of conversations around embryo-selection, including in The Wall Street Journal and Breaking Points.

To hash out some opposing viewpoints, Unsupervised Learning decided to bring on two guests that stake out ve...

On last week's episode of Unsupervised Learning, Razib spoke with Alex Nowrestah, a vice president at the Cato Institute and a strong advocate for expanding legal immigration. This week, he turned to the other side of the debate with Jason Richwhine, a resident scholar at the Center for Immigration Studies and a vocal supporter of sharply reducing immigration.

Richwine earned undergraduate degrees in mathematics and political science from American University, and later a Ph.D. in public policy from Harvard. Before joining CIS, he served as deputy director of the National Institute of Standards and Technology and wor...

Three years ago, Razib recorded two podcasts with two immigration experts on different sides of the issue, Alex Nowrestah and Jason Richwhine. While Nowrasteh, who works for the libertarian Cato Institute as Vice President for Economic and Social Policy Studies, supports higher

Today on Unsupervised Learning, Razib talks to John Hawks, a paleoanthropologist who has been a researcher and commentator in human evolutionary biology and paleoanthropology for over two decades. With a widely read weblog (now on Substack), a book on Homo naledi, and highly cited scientific papers, Hawks is an essential voice in understanding the origins of our species. He graduated from Kansas State University in 1994 with degrees in French, English, and Anthropology, and received both his M.A. and Ph.D. in Anthropology from the University of Michigan, where he studied under Milford Wolpoff. He is currently working on a textb...

Today Razib talks to Noah Millman. Millman is an American screenwriter and filmmaker, as well as a political columnist and cultural critic based in Brooklyn, New York. He is the film and theater critic for Modern Age; previously he was a columnist for The Week (2015–2022) and a senior editor at The American Conservative (2012–2017). Millman writes the newsletter Gideon's Substack, and his work has also appeared in outlets such as The New York Times and Politico. He graduated from Yale University and initially worked on Wall Street for 16 years, starting in a hedge fund's mail room, before leaving after the fina...

On this episode of Unsupervised Learning Razib talks to human geneticist Cesar Fortes-Lima about his paper from earlier this year, Population history and admixture of the Fulani people from the Sahel. Fortes-Lima has a Ph.D. in Biological Anthropology, and his primary research areas include African genetic diversity, the African diaspora, the transatlantic slave trade, demographic

On this episode of Unsupervised Learning Razib talks to Jack Despain Zhou, executive director of the Center for Educational Progress (CEP). Despain Zhou is a graduate of Western Governors University, and is completing his J.D. at Temple University. A former cryptographic analyst for the US Air Force, Despain Zhou is better known as a former producer for Jesse Singal and Katie Herzog at Blocked and Reported under the pseudonym Tracie Woodgrains.

Despain Zhou's mission with CEP is to push for individualized learning programs "where every student can advance as far and as fast as their curiosity and dete...

On this episode of Unsupervised Learning, in the wake of Elon Musk's xAI Grok chatbot turning anti-Semitic following a recent update, Razib catches up with Nikolai Yakovenko about the state of AI in the summer of 2025. Nearly three years after their first conversations on the topic, the catch up, covering ChatGPT's release and the anticipation of massive macroeconomic transformations driven by automation of knowledge-work. Yakovenko is a former professional poker player and research scientist at Google, Twitter (now X) and Nvidia (now the first $4 trillion company). With more than a decade on the leading edge computer science, Yakovenko has been at...

Today on Unsupervised Learning Razib talks to David van Ofwegen, a philosophy teacher based in Thailand. Razib and Ofwegen first met by chance while he was traveling in the US in 2003. A Dutch national, educated at the University of Leiden in the Netherlands and then the University of Hawaii, specializing in the philosophical underpinnings of Social Darwinism, Ofwegen has been based in Thailand for the last 15 years.

Razib and Ofwegen's initial connection was over their shared interest in the turmoil in Europe post-9/11 and the 2002 assassination of the right-wing Dutch politician Pim Fortyun. They discuss what has ha...

On this episode of Unsupervised Learning Razib talks to returning guest Claire Lehmann. Lehmann has an undergraduate degrees in psychology and English from the University of Adelaide. She was enrolled in a graduate program in psychology, but left it after becoming disillusioned with moral relativism, she went on to found the online magazine Quillette to reflect a more traditionally pro-reason and pro-evidence-based worldview. Within three years Lehmann was profiled in 2018 in The New York Times as a major figure within the nascent "intellectual dark web."

Razib and Claire discuss the evolution and current state of Quillette, a publicatio...

On this episode of Unsupervised Learning Razib talks to philosopher of science Nathan Cofnas, whose specialty is biology and ethics. An American, Cofnas is currently a Leverhulme Early Career Fellow in the Faculty of Philosophy at the University of Cambridge. He earned his Bachelor of Arts in Philosophy from Columbia University, and his doctorate in philosophy at the University of Oxford. His Substack is here.

First, they discuss Kevin MacDonald's theory of Judaism as a group evolutionary strategy, which is outlined in his three-book series, A People That Shall Dwell Alone: Judaism as a Group Evolutionary Strategy, Separa...

Today Razib talks to repeat guest Steve Hsu about China, a topic with so many currently relevant dimensions gIven the PRC's clear emergence as an economic, military and political rival to the US. Hsu is a Caltech‑trained theoretical physicist who migrated from black holes to big data, co‑invented privacy tech at SafeWeb, helped found the biotech company Genomic Prediction, all while remaining a prominent public voice on genetics, intelligence and the future of human enhancement. He is also a professor of physics at Michigan State, and from 2012-2020 was vice president for research and graduate studies there.

Ra...

Today Razib talks to David  Gress, a Danish historian. The son of an American literary scholar and a Danish writer, he grew up in Denmark, read Classics at Cambridge, and then earned a Ph.D. in medieval history from Bryn Mawr College in the US in 1981. During a fellowship form 1982-1992 at Stanford University's Hoover Institution, he published on Cold‑War strategy, German political culture, and Nordic security. He has been a visiting fellow and lecturer at Gonville & Caius College, Cambridge, fellow at the Danish Institute of International Affairs, an assistant professor of Classics at Aarhus University, and professor of the histo...

On this episode of the Unsupervised Learning podcast, Razib welcomes back Ethan Strauss, a writer who has covered sports and culture for the past decade, including in the book The Victory Machine: The Making and Unmaking of the Warriors Dynasty. More recently his writing is to be found at his Substack, House of Strauss, which is notable for offering a candid take on the cross-pollination between broader culture and athletics, notably in the piece Nike's End of Men: Why Nike no longer wants us to Be Like Mike.

Strauss and Razib first discuss professional sports and the diff...

On this episode of Unsupervised Learning, Razib talks to Bo Winegard and Noah Carl, the editors behind the online publication Aporia Magazine, founded in 2022. Winegard and Carl are both former academics. Winegard has a social psychology Ph.D. from Florida State University, and was an assistant professor at Marietta College. He was an editor at Quillette before moving to Aporia. Carl earned his Ph.D. in sociology from Oxford University. He was a research fellow at St. Edmund's College, Cambridge, before becoming a contributor to The Daily Skeptic and UnHerd, and a managing editor at Aporia.

First, Razib ask