What kind of person helps build a regime like the Third Reich? A monster? A madman? Or something far more unsettling?

Michael Shermer sits down with author Jack El-Hai to talk about the true story behind Nuremberg. At the center is Dr. Douglas Kelley, the American psychiatrist assigned to evaluate the top Nazi defendants after World War II, including Hermann Göring. What he found was not comforting: many of these men were intelligent, ambitious, psychologically functional, and disturbingly normal.

This conversation gets into the strange duel between Kelley and Göring, the psychological testing at Nuremberg, the limits of psychiatry, the difference between leaders and followers, and the question that still won’t go away: how do power-hungry people rise and do evil, and why do so many others go along with them?

Jack El-Hai is an author and journalist whose work has appeared in The Atlantic, Smithsonian, GQ, Wired, Scientific American, and Discover. His books, including The Lobotomist, The Lost Brothers, and Face in the Mirror, have been translated into twenty languages. He lectures widely on writing and medical history. His book The Nazi and the Psychiatrist was recently adapted into the feature film Nuremberg, starring Russell Crowe and Rami Malek.

What actually makes a life feel meaningful? In this conversation, Daniel Coyle joins Michael Shermer to talk about why fulfillment rarely comes from optimization, status, or trying to “win” at everything. Instead, it grows out of connection, shared effort, curiosity, and the kinds of projects that pull people out of themselves and into real community.

Coyle makes the case that flourishing is not a mood and not a hack. It’s a process. It happens in groups, in relationships, and in the messy work of building something with other people.

Daniel Coyle is the New York Times bestselling author of The Culture Code, which was named Best Business Book of the Year by Bloomberg, BookPal, and Business Insider. Coyle has served as an advisor to many high-performing organizations, including the Navy SEALs, Microsoft, Google, and the Cleveland Guardians. His other books include The Talent Code, The Secret Race, The Little Book of Talent, and Hardball: A Season in the Projects, which was made into a movie starring Keanu Reeves. His new book is Flourish: The Art of Building Meaning, Joy, and Fulfillment.

What actually causes cognitive decline, and how much of it can we do something about?

In this episode, Michael talks with neurologist and neuroscientist Dr. Majid Fotuhi about dementia, Alzheimer’s, memory loss, and the everyday habits that shape brain health over time. They discuss why Alzheimer’s is only part of the story, why some people remain mentally sharp into old age, and what the evidence says about exercise, sleep, diet, stress, and cognitive activity.

They also cover ADHD, attention, brain training, and the difference between ordinary forgetfulness and something more serious.

At the center of it all is a simple but important idea: many people think cognitive decline is just an unavoidable part of aging, when in fact there is often more room to protect brain function than most of us realize.

Majid Fotuhi, MD, PhD, is an adjunct professor of Neuroscience at Johns Hopkins’s Mind/Brain Institute, an adjunct professor of Psychological and Brain Sciences at George Washington University, and is the medical director of NeuroGrow Brain Fitness Center. His groundbreaking, proprietary research has been published in The Lancet, Nature, Neurology, Neuron, Proceedings of National Academy of Science, the Journal of Prevention of Alzheimer’s Disease, Journal of Rehabilitation, and Journal of Alzheimer’s Disease Reports, among others. His new book is The Invincible Brain: The Clinically Proven Plan to Age-Proof Your Brain and Stay Sharp for Life.