There is a hidden addiction plaguing humanity right now: revenge. Researchers have identified retaliation in response to real and imagined grievances as the root cause of most forms of human aggression and violence. From vicious tweets to road rage, murder-suicide, and armed insurrection, perpetrators almost always see themselves as victims seeking justice. Chillingly, recent behavioral and neuroimaging studies of the human brain show that harboring a personal grievance triggers revenge desires and activates the neural pleasure and reward circuitry of addiction.
Although this behavior is ancient and seems inevitable, by understanding retaliation and violence as an addictive brain-biological process, we can control deadly revenge cravings and save lives. In The Science of Revenge: Understanding the World's Deadliest Addiction—and How to Overcome It (Random House, 2025), Yale violence researcher and psychiatry lecturer James Kimmel, Jr., JD, uncovers the truth behind why we want to hurt the people who hurt us, what happens when it gets out of hand, and how to stop it.
Weaving neuroscience, psychology, sociology, law, and human history with captivating storytelling, Dr. Kimmel reveals the neurological mechanisms and prevalence of revenge addiction. He shines an unsparing light on humanity’s pathological obsession with revenge throughout history; his own struggle with revenge addiction that almost led him to commit a mass shooting; America’s growing addiction to revenge as a special brand of justice; and the startlingly similar addictive behaviors and motivations of childhood bullies, abusive partners, aggrieved employees, sparring politicians, street gang members, violent extremists, mass killers, and tyrannical dictators. He also reveals the amazing, healing changes that take place inside your brain and body when you practice forgiveness. Emphasizing the necessity of proven public health approaches and personal solutions for every level of revenge addiction, he offers urgent, actionable information and novel methods for preventing and treating violence.

James Kimmel, Jr. is an assistant clinical professor in psychiatry at the Yale School of Medicine, a lawyer, and the founder and co-director of the Yale Collaborative for Motive Control Studies.

Caleb Zakarin is editor of the New Books Network.

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The human mind has the curious, even mysterious, ability to generate thoughts about things with which we are not in causal contact, such as when we think about yesterday’s tennis final, or Aristotle, or unicorns. Naturalizing mental content has usually meant explaining how this is possible in terms that eliminate the mystery while retaining commitment to a substantive relationship between mind and world that undergirds this ability. In Deflating Mental Representation (MIT Press), Frances Egan argues that we should give up this commitment in favor of a naturalistic account that treats attributions of content as abstract glosses of neural mechanisms. According to Egan, who is emeritus professor of philosophy at Rutgers University—New Brunswick, representational glosses play ineliminable roles in commonsense psychology and our explanations of human behavior, but they should not be taken literally. Egan forcefully challenges many leading theories of mental representation, making her book a must-read for those interested in the concept of mental representation in the cognitive sciences.

Deflating Mental Representation is available open-access and free here. 

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Octopuses can open jars to get food, and chimpanzees can plan for the future. An IBM computer named Watson won on Jeopardy! and Alexa knows our favorite songs. But do animals and smart machines really have intelligence comparable to that of humans? In Bots and Beasts: What Makes Machines, Animals, and People Smart? (MIT Press, 2021), Paul Thagard looks at how computers (“bots”) and animals measure up to the minds of people, offering the first systematic comparison of intelligence across machines, animals, and humans.

Thagard explains that human intelligence is more than IQ and encompasses such features as problem solving, decision making, and creativity. He uses a checklist of twenty characteristics of human intelligence to evaluate the smartest machines—including Watson, AlphaZero, virtual assistants, and self-driving cars—and the most intelligent animals—including octopuses, dogs, dolphins, bees, and chimpanzees. Neither a romantic enthusiast for nonhuman intelligence nor a skeptical killjoy, Thagard offers a clear assessment. He discusses hotly debated issues about animal intelligence concerning bacterial consciousness, fish pain, and dog jealousy. He evaluates the plausibility of achieving human-level artificial intelligence and considers ethical and policy issues. A full appreciation of human minds reveals that current bots and beasts fall far short of human capabilities.

Galina Limorenko is a doctoral candidate in Neuroscience with a focus on biochemistry and molecular biology of neurodegenerative diseases at EPFL in Switzerland. To discuss and propose the book for an interview you can reach her at [email protected].

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Not a lot of authors go from spending their early twenties homeless and addicted to cocaine to becoming one of the world’s leading researchers on the neuroscience of addiction. But Dr. Judith Grisel, in her new book Never Enough: The Neuroscience and Experience of Addiction (Doubleday, 2019), uses her personal story to illuminate the ways in which the brain, in collusion with social and biological factors, makes addiction possible. In our discussion, Grisel outlines the effects of different drugs, explains the “three laws of psychopharmacology,” and wonders if we’ll ever find medicine’s “holy grail” – a cure for addiction.

Emily Dufton is the author of Grass Roots: The Rise and Fall and Rise of Marijuana in America (Basic Books, 2017). A drug historian and writer, she edits Points, the blog of the Alcohol and Drugs History Society.

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The vagus nerve is fundamental to our health and vitality, coordinating critical functions from the precise heartbeat we need to exercise or rest to the balance of appetite and digestion. Made up of 200,000 fibers, the vagus nerve sends thousands of electrical signals every second between your brain and your most important organs. Yet despite its essential role in life, important vagus nerve functions have eluded centuries of scientific investigation. Now neurosurgeon and researcher Dr. Kevin Tracey has discovered the previously unknown power of the vagus nerve to reverse inflammation, balance the immune system, treat chronic illness, and keep our organs humming together in harmony.
In The Great Nerve: The New Science of the Vagus Nerve and How to Harness Its Healing Reflexes (Penguin, 2025), Dr. Tracey shows us how stimulating the vagus nerve with a tiny electrical implant has the potential to reverse life-altering diseases like rheumatoid arthritis, inflammatory bowel disease, lupus, MS, diabetes, obesity, stroke, depression, Alzheimer’s and Parkinson’s. If this sounds too good to believe, Dr. Tracey shares stories of patients who have gone from being nearly bedridden to running and dancing, along with the science that makes possible these recoveries. He also explains the evidence for lifestyle strategies like ice baths, meditation, exercise, and breathwork that can maintain and improve vagus nerve function.
By opening the door to the new field of neuroimmunology, The Great Nerve  not only revolutionizes how we understand and treat disease, it gives us unprecedented hope for our health. This is the story of your body’s ability to heal itself.

This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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Because brainwashing affects both the world and our observation of the world, we often don’t recognize it while it’s happening—unless we know where to look. As Rebecca Lemov writes in The Instability of Truth, “Brainwashing erases itself.” What we call brainwashing is more common than we think; it is not so much what happens to other people as what can happen to anyone.

The Instability of Truth exposes the myriad ways our minds can be controlled against our will, from the brainwashing techniques used against American POWs in North Korea to the “soft” brainwashing of social media doomscrolling and behavior-shaping. In our increasingly data-driven world, anyone can fall victim to mind control. Lemov identifies invasive forms of emotional engineering that exploit trauma and addiction to coerce and persuade in everyday life. Tracing the word “brainwashing” from deep in the files of an operative of the U.S. Office of Strategic Services in the 1950s to the pioneering research of Robert Jay Lifton, to the public trials of cult leaders and the case of Patty Hearst, Lemov also studies how the idea of mind control has spread across the globe and penetrated courtrooms, secret labs, military schools, and today’s digital sites.

The Instability of Truth offers lessons from mind-control episodes past and present. Truth is always subject to question in more mundane walks of life than most people believe, and Lemov equips us for the increasing challenges we face from social media, AI, and an unprecedented, global form of surveillance capitalism. The Instability of Truth develops a rigorous new understanding of both brainwashing’s paradoxes and its emotional roots, by giving voice to brainwashers, the brainwashed, and third-party observers alike.

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How can I help my students not only learn my course material but also retain and transfer that information? This is a question that has plagued and intrigued teachers for centuries. In Smart Teaching Stronger Learning: Practical Tips for 10 Cognitive Scientists, the authors provide their readers with evidence-based practices for immediate classroom implementation. Their premise is that small changes can lead to powerful results.

In this approachable book, each chapter is written by a cognitive scientist who is currently teaching. The chapters introduce a concept, describe how to implement the concept in your classroom, and provide multiple resources for further study. The book is consciously formatted to be a quick read (approximately 100 pages) and provides valuable information for anyone who is interested in helping someone else or themselves learn. Teachers, parents, coaches, and lifelong learners will benefit from these strategies.

In this episode, Dr. Pooja Agarwal, Dr. Cynthia Nebel, and Dr. Veronica Yan, discuss each of the topics presented in Smart Teaching Stronger Learning: Practical Tips for 10 Cognitive Scientists. Dr. Nebel discusses how learning increases motivation by discussing the Effective Teaching Cycle: Motivation, Scaffolding, and Reinforcement. Dr. Yan discusses the importance of interleaving. Dr. Agarwal provides an overview of the other chapter topics: retrieval practice, early childhood education, metacognition, concept mapping, learning transfer, engagement, and neuromyths. Throughout the episode, Drs. Agarwal, Nebel, and Yan share how these tips have been implemented in their classrooms, and how these same concepts can universally be applied to learning in general.

Dr. Pooja Agarwal is the author of the books Powerful Teaching and Smart Teaching Stronger Learning: Practical Tips for 10 Cognitive Scientists. She is editor-in-chief of Retrievalpractice.org and is an Associate Professor of Psychology at the Berklee College of Music in Boston, MA.

Dr. Cynthia Nebel is the Director of Learning Services and an Associate Professor of Psychiatry and Behavioral Neuroscience at St. Louis University School of Medicine in St. Louis, MO.

Dr. Veronica Yan is an Associate Professor of Educational Psychology at the University of Texas at Austin in Austin, TX.

Dr. Anne-Marie Verenna is a Professor of Biology and the Scholarship of Teaching and Learning Faculty Fellow at Delaware County Community College in Media, PA.

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Picturing Aura: A Visual Biography (MIT Press, 2025) by Dr. Jeremy Stolow is the first book of its kind: an extended historical, anthropological, and philosophical study of modern efforts to visualize the hidden radiant force encompassing the living body known as our aura. This rich, interdisciplinary study by Dr. Stolow chronicles the rise and global spread of modern instruments and techniques of picturing aura, from the late nineteenth century to the present day, exploring how its images are put to work in the diverse realms of psychical research, esotericism, art photography, popular culture, and the New Age alternative medical and spiritual marketplace.
At their core, pictures of auras are boundary objects that operate simultaneously in multiple conceptual and practical realms, serving varying goals of making art, healing bodies, and exploring the cosmos. Drawing on extensive archival as well as field research, Stolow reconstructs a global history of this boundary-crossing enterprise through its evolving media technologies, markets, and cultural arenas. It is a story shaped through exchanges among professionals and amateurs, scientists and occultists, countercultural artists and entrepreneurs, metropolitans and hinterland figures. With more than 60 full-color illustrations, Picturing Aura brings to light a remarkable, entangled history of picture-making that challenges settled assumptions about religion, art, and science.

This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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Who benefits and who loses when emotions are described in particular ways? How do metaphors such as "hold on" and "let go" affect people's emotional experiences? Banned Emotions: How Metaphors Can Shape What People Feel (Oxford UP, 2019), written by neuroscientist-turned-literary scholar Laura Otis, draws on the latest research in neuroscience and psychology to challenge popular attempts to suppress certain emotions. This interdisciplinary book breaks taboos by exploring emotions in which people are said to "indulge" self-pity, prolonged crying, chronic anger, grudge-bearing, bitterness, and spite. By focusing on metaphors for these emotions in classic novels, self-help books, and popular films, Banned Emotions exposes their cultural and religious roots.

Examining works by Dante, Dickens, Dostoevsky, Kafka, Forster, and Woolf in parallel with Bridesmaids, Fatal Attraction, and Who Moved My Cheese?, Banned Emotions traces pervasive patterns in the ways emotions are represented that can make people so ashamed of their feelings, they may stifle emotions they need to work through. The book argues that emotion regulation is a political as well as a biological issue, affecting not only which emotions can be expressed, but who can express them, when, and how.

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Mice are used as model organisms across a wide range of fields in science today--but it is far from obvious how studying a mouse in a maze can help us understand human problems like alcoholism or anxiety. How do scientists convince funders, fellow scientists, the general public, and even themselves that animal experiments are a good way of producing knowledge about the genetics of human behavior? In Model Behavior: Animal Experiments, Complexity, and the Genetics of Psychiatric Disorders (U Chicago Press, 2018), Nicole C. Nelson takes us inside an animal behavior genetics laboratory to examine how scientists create and manage the foundational knowledge of their field.

Behavior genetics is a particularly challenging field for making a clear-cut case that mouse experiments work, because researchers believe that both the phenomena they are studying and the animal models they are using are complex. These assumptions of complexity change the nature of what laboratory work produces. Whereas historical and ethnographic studies traditionally portray the laboratory as a place where scientists control, simplify, and stabilize nature in the service of producing durable facts, the laboratory that emerges from Nelson's extensive interviews and fieldwork is a place where stable findings are always just out of reach. The ongoing work of managing precarious experimental systems means that researchers learn as much--if not more--about the impact of the environment on behavior as they do about genetics. Model Behavior offers a compelling portrait of life in a twenty-first-century laboratory, where partial, provisional answers to complex scientific questions are increasingly the norm.

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