The Power of Common Knowledge: Steven Pinker on Language, Norms, and Punishment
Release Date: 09/23/2025
Logic, Creativity, and the Limits of AI: How Humans Think in Ways Machines Never Will
The Michael Shermer Show
In this episode, Angus Fletcher explains why the human brain doesn’t work like a computer and why our deepest strengths come not from logic or data processing but from imagination, emotion, and the ability to invent new futures. Drawing on neuroscience, Shakespeare, evolutionary biology, and his work with U.S. Army Special Operations, Fletcher shows how storytelling is the brain’s oldest “technology,” why intelligence is rooted in action rather than analysis, and what most people get wrong about creativity and common sense. Angus Fletcher is a professor of story science at Ohio...
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The Psychology of War: Could YOU Make a Moral Choice in Wartime?
The Michael Shermer Show
War begins in the human mind long before it unfolds on the battlefield. In this episode, Michael Shermer sits down with Nicholas Wright, a neurologist, neuroscientist, security strategist, and advisor to the Pentagon, to explore one of the biggest questions of our time: why do humans fight, and how does the brain shape violence, leadership, and geopolitical decision-making? Nicholas Wright is a member of the Royal Colleges of Physicians and a neuroscientist who researches the brain, technology, and security at University College London, Georgetown University, and the Center for Strategic and...
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Tribes, Teams, and Cults: How Groups Shape What We Believe
The Michael Shermer Show
Why do smart people join dangerous cults, follow bad leaders, or stay silent when they know something’s wrong? In this episode, Michael Shermer talks with organizational psychologist Colin Fisher about the science of group dynamics and conformity. From jazz bands to political mobs, Fisher explains how our evolutionary need to belong both unites and blinds us. He discusses the psychology of revenge, polarization, social media extremism, and why our brains are wired to dehumanize “the other.” What makes a group innovative instead of dogmatic? And how close are we—really—to turning...
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Shermer Says 3: Weird Experiences, the Meaning of Dreams, and What Mark Twain Knew About Reality
The Michael Shermer Show
In this episode, Michael Shermer explores anomalous experiences through personal anecdotes and historical examples. He reflects on how to balance healthy skepticism with open-mindedness, and how to reckon with the very real emotional significance of such experiences—regardless of the scientific explanations behind them.
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A Former Spy Explains How AI is Changing Espionage
The Michael Shermer Show
A former senior intelligence officer explains how espionage is evolving in the age of AI and amid rising global tensions with China, and why the mass harvesting of data affects not just nation-states, but all of us. The discussion also explores the history of spying, what life is really like for intelligence officers, and major intelligence failures and scandals, including 9/11 and Edward Snowden’s unauthorized disclosures about the NSA. Anthony Vinci served as the first Chief Technology Officer at the National Geospatial-Intelligence Agency (NGA). Earlier in his career he served in Iraq,...
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Did Lost Civilizations Really Exist? An Archaeologist Explains
The Michael Shermer Show
Archaeologist Ken Feder sheds light on how archaeology separates evidence from wishful thinking and entertaining storytelling. He explains what rock art, radiocarbon dating, and DNA can really tell us about the first peoples of the Americas, and talks about the different theories about ancient human migration and the impact of European contact on Native American populations. He also shares what we know about Atlantis, the Lost Tribes of Israel, and what to make of Graham Hancock’s visions of an ancient apocalypse. Kenneth L. Feder is professor emeritus of anthropology at Central Connecticut...
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Charles Murray: Why I’m Taking Religion Seriously
The Michael Shermer Show
Michael Shermer sits down with Charles Murray (author of The Bell Curve, Coming Apart, and now Taking Religion Seriously) for a riveting 100-minute conversation about Murray’s late-life turn from Harvard-bred agnosticism (“Smart people don’t believe that stuff anymore”) to Bayesian theism (“I put the afterlife at just over 50%”). This wide-ranging discussion explores the evidence for the existence of God and the afterlife, the problem of evil, and the historical growth of Christianity. They also delve into topics such as the nature of consciousness, terminal lucidity, and even...
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The Myth of Human Exceptionalism: Why Humans Aren’t as Special as We Think
The Michael Shermer Show
In this episode, Harvard primatologist Christine Webb challenges one of our deepest beliefs: that humans stand apart from the rest of nature. She traces the roots of human exceptionalism from Aristotle and Descartes to modern science, and explains why we still cling to hierarchies of intelligence. While most critiques of human exceptionalism focus on our moral obligation toward other species, Webb argues that they overlook what humanity stands to gain by letting go of its illusions of uniqueness and superiority. Christine Webb is a primatologist at Harvard’s Department of Human Evolutionary...
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Shermer Says: Why Secularists Are Turning to Religion, The Substitution Hypothesis, Sleep Paralysis
The Michael Shermer Show
Are we entering a Fifth Great Awakening—a cultural swing back toward religion? An increasing number of books and articles are calling for a religious revival. “We need religion to keep our society functioning.” “People need meaning.” Michael Shermer responds to and revisits the historical waves of religious fervor that shaped American life. He also asks what today’s renewed interest in faith, spirituality, and meaning says about our culture. Featuring commentary on new books by Ayaan Hirsi Ali and Charles Murray, and a preview of Helen Pluckrose’s new article for Skeptic.
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The Serial Killer Era of the 70s/80s: Lore, Patterns, and Plausible Explanations
The Michael Shermer Show
Pulitzer-winner Caroline Fraser maps the lives and crimes of Ted Bundy and his infamous peers—the Green River Killer, the I-5 Killer, the Night Stalker, the Hillside Strangler, and even Charles Manson—and explores an intriguing hypothesis: might environmental factors have played a role in the rise of serial killers in the 1970s and ’80s? Caroline Fraser is the author of Prairie Fires: The American Dreams of Laura Ingalls Wilder, which won the Pulitzer Prize. She is also the author of God’s Perfect Child: Living and Dying in the Christian Science Church, and her writing has appeared in...
info_outlineCommon knowledge is necessary for coordination, for making arbitrary but complementary choices like driving on the right, using paper currency, and coalescing behind a political leader or movement. It’s also necessary for social coordination. Humans have a sixth sense for common knowledge, and we create it with signals like laughter, tears, blushing, eye contact, and blunt speech.
But people also go to great lengths to avoid common knowledge—to ensure that even if everyone knows something, they can’t know that everyone else knows they know it. And so we get rituals like benign hypocrisy, veiled bribes and threats, sexual innuendo, and pretending not to see the elephant in the room.
Pinker shows how the hidden logic of common knowledge can make sense of many of life’s enigmas: financial bubbles and crashes, revolutions that come out of nowhere, the posturing and pretense of diplomacy, the eruption of social media shaming mobs and academic cancel culture, the awkwardness of a first date.
Steven Pinker is the Johnstone Professor of Psychology at Harvard University. He is an elected member of the National Academy of Sciences, a two-time Pulitzer Prize finalist, and one of Time’s “100 Most Influential People in the World Today.” He has won many prizes for his teaching, his research on language, cognition, and social relations, and his twelve books. His new book is When Everyone Knows That Everyone Knows: Common Knowledge and the Mysteries of Money, Power, and Everyday Life.