People I (Mostly) Admire

Nobel laureate, bestselling author, and groundbreaking psychologist Daniel Kahneman died in March. In 2021 he talked with Steve Levitt — his friend and former business partner — about his book "Noise: A Flaw in Human Judgment" (cowritten with Olivier Sibony and Cass Sunstein) and much more.

Google researcher Blaise Agüera y Arcas spends his work days developing artificial intelligence models and his free time conducting surveys for fun. He tells Steve how he designed an algorithm for the U.S. Navy at 14, how he discovered the truth about printing-press pioneer Johannes Gutenberg, and when A.I. first blew his mind.

After Haiti’s devastating earthquake, Rajiv Shah headed the largest humanitarian effort in U.S. history. As chief economist of the Gates Foundation he tried to immunize almost a billion children. He tells Steve why it’s important to take big gambles, follow the data, and own up to your mistakes.

"The Power of Habit" author Charles Duhigg wrote his new book in an attempt to learn how to communicate better. Steve shares how the book helped him understand his own conversational weaknesses.

Cat Bohannon’s new book puts female anatomy at the center of human evolution. She tells Steve why it takes us so long to give birth, what breast milk is really for, and why the human reproductive system is a flaming pile of garbage.

Economist Daron Acemoglu likes to tackle big questions. He tells Steve how colonialism still affects us today, who benefits from new technology, and why democracy wasn’t always a sure thing.

Journalist Walt Hickey uses data to understand how culture works. He and Steve talk about why China hasn’t produced any hit movies yet and how he got his own avatar in the Madden NFL video game.

Arnold Schwarzenegger has been a bodybuilder, an actor, a governor, and, now, an author. He tells Steve how he’s managed to succeed in so many fields — and what to do when people throw eggs at you.

Physicist Helen Czerski loves to explain how the world works. She talks with Steve about studying bubbles, setting off explosives, and how ocean waves have changed the course of history.

The filmmaker doesn’t want to be known only for his movies. He tells Steve why he considers himself a writer first, how it feels to be recognized for his role in "The Mandalorian," and why he once worked as a rodeo clown.

Economist Michael D. Smith says universities are scrambling to protect a status quo that deserves to die. He tells Steve why the current system is unsustainable, and what’s at stake if nothing changes.

Computer scientist Fei-Fei Li had a wild idea: download one billion images from the internet and teach a computer to recognize them. She ended up advancing the state of artificial intelligence — and she hopes that will turn out to be a good thing for humanity.

Data scientist Nate Silver gained attention for his election predictions. But even the best prognosticators get it wrong sometimes. He talks to Steve about making good decisions with data, why he’d rather write a newsletter than an academic paper, and how online poker led him to the world of politics.

Abraham Verghese is a physician and a best-selling author — in that order, he says. He explains the difference between curing and healing, and tells Steve why doctors should spend more time with patients and less with electronic health records.

Claudia Goldin is the newest winner of the Nobel Prize in Economics. Steve spoke to her in 2021 about how inflexible jobs and family responsibilities make it harder for women to earn wages equal to their male counterparts.

For 37 years, Rick Doblin has been pushing the F.D.A. to approve treating post-traumatic stress disorder with MDMA, better known as Ecstasy. He tells Steve why he persisted for so long, why he doesn’t like calling drug use “recreational,” and what he learned from his pet wolf.

Psychologist Thomas Curran argues that perfectionism isn’t about high standards — it’s about never being enough. He explains how the drive to be perfect is harming education, the economy, and our mental health.

Avi Loeb is a Harvard astronomer who argues that we’ve already encountered extraterrestrial technology. His approach to the search for interstellar objects is scientific, but how plausible is his argument?

Reginald Dwayne Betts spent more than eight years in prison. Today he's a Yale Law graduate, a MacArthur Fellow, and a poet. His nonprofit works to build libraries in prisons so that more incarcerated people can find hope.

Obi Felten used to launch projects for X, Google’s innovation lab, but she’s now tackling mental health. She explains why Steve’s dream job was soul-destroying for her, and how peer support could transform the therapeutic industry.

Artist Wendy MacNaughton knows the difficulty of sitting in silence and the power of having fun. She explains to Steve the lessons she’s gleaned from drawing hospice residents, working in Rwanda, and reporting from Guantanamo Bay.

Sal Khan returns to discuss his innovative online high school’s first year — and Steve grills a member of the school’s class of 2026 about what it’s really like.

The creator of "The Wire", "The Deuce", and other shows is leading the Writers Guild on the picket lines. He and Steve break down the economics of TV writing, how A.I. could change television, and why he’s taking a stand even though he’s at the top of the game.

In the newest show from the Freakonomics Radio Network, host Zachary Crockett explores the hidden side of the things around us. This week: How do dinosaur bones emerge from the Upper Cretaceous period to end up in natural-history museums and private collections?

Robert Solow is 98 years old and a giant among economists. He tells Steve about cracking German codes in World War II, why it’s so hard to reduce inequality, and how his field lost its way.

Talithia Williams thinks you should rigorously track your body's data. She and Steve Levitt trade birth stories and bemoan the state of STEM education.

Kevin Kelly believes A.I. will create more problems for humanity — and help us solve them. He talks to Steve about embracing complexity, staying enthusiastic, and taking the 10,000-year view.

Clementine Jacoby went from performing in a circus to founding a nonprofit that works to shrink the prison population.

Steve is on a mission to reform math education, and Sarah Hart is ready to join the cause. In her return visit to the show, Sarah explains how patterns are everywhere, constraints make us more creative, and literature is surprisingly mathematical.

From recording some of the first rap hits to revitalizing Johnny Cash's career, the legendary producer has had an extraordinary creative life. In this episode he talks about his new book and his art-making process — and helps Steve get in touch with his own artistic side.

Physician Peter Attia returns to the show to talk about the science of longevity — which focuses not only on extending life but on maintaining good health into old age. He explains the possibilities and limits of current medicine and gives Steve his best advice on how to defeat the aging process.

Steve and producer Morgan Levey look back at the first 100 episodes of the podcast, including surprising answers, spectacular explanations, and listeners who heard the show and changed their lives.

Tom Dart is transforming Cook County’s jail, reforming evictions, and, with Steve Levitt, trying a new approach to electronic monitoring.

Since his last visit to "People I (Mostly) Admire," the formerly top-ranked golfer has become the sport's most controversial figure. Why has he partnered with the Saudi government — and can his new golf league unseat a monopoly?

Neil Shubin hunts for fossils in the Arctic and experiments with D.N.A. in the lab, hoping to find out how fish evolved to walk on land. He explains why unlocking these answers could help humans today.

Ecologist Suzanne Simard studies the relationships between trees in a forest: they talk to each other, punish each other, and depend on each other. What can we learn from them?

The mathematician and author sees mathematical patterns everywhere — from DNA to fireflies to social connections.

When "Freakonomics" co-authors Steve Levitt and Stephen Dubner first met, one of them hated the other. Two decades later, Levitt grills Dubner about asking questions, growing the pie, and what he learned from Bruce Springsteen.

From baseball card conventions to Walmart, John List has always used field experiments to say revolutionary things about economics. He explains the value of an apology, why scaling shouldn’t be an afterthought, and why he moved to the private sector to stay at the forefront of science.

Former professional poker player Annie Duke has a new book on Steve’s favorite subject: quitting. They talk about why quitting is so hard, how to do it sooner, and why we feel shame when we do something that’s good for us.

Author and YouTuber John Green thought his breakout bestseller wouldn’t be a commercial success, wrote 40,000 words for one sentence, and brought Steve to tears.

The ethologist and conservationist discusses the thrill of observing chimpanzees in the wild, the value of challenging orthodoxy, and why dying is her next great adventure.

The philosopher known for his rigorous ethics explains why Steve is leading a morally inconsistent life.

Stanford professor Carolyn Bertozzi’s imaginative ideas for treating disease have led to ten start-ups. She talks with Steve about the next generation of immune therapy she’s created, and why she might rather be a musician.

Heeding the warnings of public health officer Charity Dean about Covid-19 could have saved lives. Charity explains why she loves infectious diseases and why she moved to the private sector.

The documentary filmmaker, known for "The Civil War," "Jazz," and "Baseball," turns his attention to the Holocaust, and asks what we can learn from the evils of the past.

Harvard economist Raj Chetty uses tax data to study inequality, kid success, and social mobility. He explains why you should be careful when choosing your grade school teachers — and your friends.

Philosopher Will MacAskill thinks about how to do as much good as possible. But that's really hard, especially when you're worried about humans who won't be born for many generations.

Victoria Groce is one of the best trivia contestants on earth. She explains the structure of a good question, why she knits during competitions, and how to memorize 160,000 flashcards.

The author of "Sapiens" has a knack for finding the profound in the obvious. He tells Steve why money is fiction, traffic can be mind-blowing, and politicians have a right to say stupid things in private.

When she's not rescuing chickens from coyotes, Susan Athey uses economics to address real-world challenges — from online ad auctions to carbon capture technology.

Khan Academy founder Sal Khan returns to share his vision for a new way to learn — and the conversation inspires Steve to make a big announcement.

Astronomer Jill Tarter spent her career searching for extraterrestrial intelligence. She explains what civilizations from other planets could teach us about our own future.

Game theorist Barry Nalebuff explains how he used basic economics to build Honest Tea into a multimillion-dollar business, and shares his innovative approach to negotiation.

David Keith has spent his career studying ways to reflect sunlight away from the earth. It could reduce the risks of climate change — but it won’t save us.

Billionaire John Arnold is figuring out how to do as much good as he can with his wealth. It takes hard work, risk tolerance, and a lot of spending.

Many of us hate to think about future crises. Game designer Jane McGonigal wants to make it fun.

Jane McGonigal designed a game to help herself recover from a traumatic brain injury — and she thinks playing games can help us all lead our best lives.

Seth Stephens-Davidowitz combs through mountains of information to find advice for everyday life.

Soil scientist Asmeret Asefaw Berhe could soon hold one of the most important jobs in science. She explains why the ground beneath our feet is one of our greatest resources — and, possibly, one of our deadliest threats.

How psychologist Dan Gilbert went from high school dropout to Harvard professor, found the secret of joy, and inspired Steve Levitt's divorce.

Linguist and social commentator John McWhorter explains how good intentions may be hurting Black America — and where the word “motherf*cker” comes from.

Beatrice Fihn wants to rid the world of nuclear weapons. As Russian aggression raises the prospect of global conflict, can she put disarmament on the world's agenda?

Nobel Prize winner Joshua Angrist explains how the draft lottery, the Talmud, and West Point let economists ask — and answer — tough questions.

Palliative physician B.J. Miller asks: Is there a better way to think about dying? And can death be beautiful?

Naturalist Sy Montgomery explains how she learned to be social from a pig, discovered octopuses have souls, and came to love a killer that will never love her back.

Gene-editing pioneer Jennifer Doudna worries that humanity might not be ready for the technology she helped develop.

Columbia astrophysicist David Helfand is an academic who does things his own way — from turning down job security to helping found a radically unconventional university.

Stanford professor Carolyn Bertozzi’s imaginative ideas for treating disease have led to ten start-ups. She talks with Steve about the next generation of immune therapy she’s created, and why she might rather be a musician.

Climbing the corporate ladder to become head of Nike’s Jordan brand, he kept his teenage murder conviction a secret from employers. Larry talks about living in fear, accepting forgiveness, and why it was easier to be bookish behind bars.

Steve loved Michael Lewis’s latest, The Premonition, but has one critique: Why aren’t there even more villains? Also, why the author of best-sellers Moneyball and The Big Short can barely read a page of his first book without cringing.

A leading expert on the Reformation era, Brad, a University of Notre Dame professor, tells Steve about how the “blood gets sucked out of history,” and why historians and economists don’t quite see eye to eye.

The former chairman of the Obama administration’s Council of Economic Advisors tells Steve how improv comedy was a better training ground for teaching than a Ph.D. from M.I.T., and why he’s glad he was wrong about the automotive-industry bailout.

By mid-century, 10 million people a year are projected to die from untreatable infections. Can Cassandra, an ethnobotanist at Emory University convince Steve that herbs and ancient healing are key to our medical future?

The Columbia neuroscientist and psychology professor Carl Hart believes that recreational drug use, even heroin, methamphetamines, and cocaine, is an inalienable right. Can he convince Steve?

Amaryllis Fox is a former C.I.A. operative and host of the Netflix show The Business of Drugs. She explains why intelligence work requires empathy, and she soothes Steve’s fears about weapons of mass destruction.

Steve usually asks his guests for advice, whether they’re magicians or Nobel laureates. After nearly 60 episodes, is any of it worth following — or should we just ask listeners instead?

The Nobel laureate and pioneering behavioral economist spars with Steve over what makes a nudge a nudge, and admits that even economists have plenty of blind spots.

The legendary venture capitalist believes the same intuition that led him to bet early on Google can help us reach net-zero carbon emissions by 2050. But Steve wonders why his plan doesn’t include a carbon tax.

Harvard economist Claudia Goldin and Steve talk about how inflexible jobs and family responsibilities make it harder for women to earn wages equal to their male counterparts. But could Covid actually level the playing field?

He’s the award-winning author of hugely popular books like Guns, Germs, and Steel; Collapse; and Upheaval. But Jared actually started his varied career as an expert on gallbladders and birds. The physiologist turned geographer talks with Steve about his brushes with death, why the Norse Greenlanders wouldn’t eat fish, and why he has never been invited to a cannibal ceremony.

He’s tried to shake up the status quo — as a Democratic presidential candidate, a New York City mayoral candidate, and now the founder of the Forward party. Will his third try be the charm? Andrew talks with Steve about what it’s like to lose an election and why a third political party might be the best chance for avoiding a new civil war.

Everyone agrees that massive deforestation is an environmental disaster. But most of the standard solutions — scolding the Brazilians, invoking universal morality — ignore the one solution that might actually work. Originally released on Freakonomics Radio, Steve gives an update on what’s happened in the two years since this episode first ran.

He’s an M.I.T. cosmologist, physicist, and machine-learning expert, and once upon a time, almost an economist. Max and Steve continue their conversation about the existential threats facing humanity, and what Max is doing to mitigate our risk. The co-founder of the Future of Life Institute thinks that artificial intelligence can be the greatest thing to ever happen to humanity — if we don’t screw it up.

How likely is it that this conversation is happening in more than one universe? Should we worry more about Covid or about nuclear war? Is economics a form of “intellectual prostitution?” Steve discusses these questions, and more, with Max, an M.I.T cosmologist, physicist, and machine-learning expert — who was once almost an economist. He also tells Steve why we should be optimistic about the future of humanity (assuming we move Earth to a larger orbit before the sun evaporates our oceans).

He’s a pioneer of using randomized control experiments in economics — studying the long-term benefits of a $1 health intervention in Africa. Steve asks Edward, a Berkeley professor, about Africa’s long-term economic prospects, and how a parking-ticket-scandal in New York City led to a major finding on corruption around the world.

Playing notes on her piano, she demonstrates for Steve why whole numbers sound pleasing, why octaves are mathematically imperfect, and how math underlies musical composition. Sarah, a professor at the University of London and Gresham College, also talks with Steve about the gender gap in mathematics and why being interested in everything can be a problem.

His childhood dream of playing in the N.B.A. led him to a career as a referee. Marc is one of the league’s top performers after over 20 seasons, but he still reviews every single one of his calls. He talks with Steve about being scrutinized by players, fans, and management; how much work — and data — go into being fair; and why he talks about race with his colleagues and his kids.

It was only in his late twenties that America’s favorite brainiac began to seriously embrace his love of trivia. Jeopardy!’s newest host also holds the show’s “Greatest of All Time” title. Steve digs into how Ken trained for the show, what it means to have a "geographic memory," and why we lie to our children.

This new Jeopardy! host is best known for playing neurobiologist Amy Farrah Fowler on The Big Bang Theory, but she has a rich life outside of her acting career too, as a teacher, mother — and a real-life neuroscientist. Steve learns more about this one-time academic and Hollywood non-conformist, who is both very similar to him and also quite his opposite.

The prisoner’s dilemma is a classic game-theory problem. Robert, a political scientist at the University of Michigan, has spent his career studying it — and the ways humans can cooperate, or betray each other, for their own benefit. He and Steve talk about the best way to play it and how it shows up in real world situations, from war zones to Steve’s own life.

Steve shows a different side of himself in very personal interviews with his two oldest daughters. Amanda talks about growing up with social anxiety and her decision to not go to college, while Lily speaks candidly about her battle with anorexia and the conversation she had with Steve that led her to finally seek treatment.

When we try to improve things, our first thought is often: What can we add to make this better? But Leidy, a professor of engineering, says we tend to overlook the fact that a better solution might be to take something away. He and Steve talk about examples from Leidy’s book Subtract: The Untapped Science of Less, and from their own lives.

An expert on urban economics and co-author of the new book Survival of the City, Ed says cities have faced far worse than Covid. Steve talks with the Harvard professor about why the slums of Mumbai function so well, high-quality housing in China sits empty, and declining cities hang on for so long.

Former U.S. Secretary of Education, 3x3 basketball champion, and leader of an anti-gun violence organization are all on Arne’s resume. He’s also Steve’s neighbor. The two talk about teachers caught cheating in Chicago public schools and Steve shares a story he’s never told Arne, about a defining moment in the educator’s life.

A special episode: Steve reports on a passion of his. Most high-school math classes are still preparing students for the Sputnik era. Steve wants to get rid of the “geometry sandwich” and instead have kids learn what they really need in the modern era: data fluency. Originally broadcast on Freakonomics Radio, this episode includes an update from Steve about a project he launched to revamp the education system.

He’s a Harvard physician and economist who just started a third job: host of the new podcast Freakonomics, M.D. He’s also Steve’s former student. The two discuss why medicine should embrace econ-style research, the ethics of human-challenge trials, and Bapu’s role in one of Steve’s, ahem, less-than-successful experiments.

He argues that personal finance is so simple all you need to know can fit on an index card. How will he deal with Steve’s suggestion that Harold’s nine rules for managing money are overly complicated? Harold and Steve also talk about gun violence — a topic Harold researches as a public-policy professor at the University of Chicago — and they propose some radical ideas for reducing it.

She’s the C.E.O. of Zoox, an autonomous vehicle company. Steve asks Aicha about the big promises the A.V. industry hasn’t yet delivered — and the radical bet Zoox is making on a driverless future. Plus, Steve wants to know how she’s maintained her spark.