About the book

- Publisher
- The MIT Press
- Published
- 17 June 2025
- Pages
- 328
- ISBN
- 978-0-262-55220-2
- Website
- psychopathyunmasked.com (opens in a new tab)
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Why our fascination with psychopaths is scientifically wrongheaded, and how the criminal justice system has misused the controversial science of psychopathy.
Psychopathy is a widely acknowledged personality disorder associated with callous unemotional traits and antisocial behaviors. Psychopathic persons are described as dangerous predators incapable of empathy and moral intuition, and while they are believed to make up only around 1 percent of the general population, forensic experts claim they are disproportionately responsible for the majority of violent crimes. Today, psychopathy assessments are being widely used in the legal system to inform a variety of judicial decisions. In Psychopathy Unmasked, Rasmus Rosenberg Larsen provides a critical rebuttal of psychopathy and its legal use, scrutinizing central claims about the diagnosis that have traditionally served to justify its role in the criminal justice system.
It is estimated that hundreds of thousands of offenders undergo a psychopathy assessment each year in North America. This book surveys and discusses contemporary developments in psychopathy research where studies have consistently shown that psychopathic persons, contrary to mainstream beliefs, are not meaningfully more dangerous than, or psychologically different from, ordinary non-psychopathic criminals. Based on these disqualifying findings, Larsen argues that we should end the use of psychopathy assessments in the legal system.
Praise
Larsen’s Psychopathy Unmasked challenges everything we thought we knew about the so-called psychopathic personality disorder. It has the potential to revolutionize forensic psychology research and practice like few other books before it.
There are countless books on psychopathy, but Psychopathy Unmasked is the first scholarly book to provide a critical analysis of psychopathy. Larsen skillfully challenges what we think we know about psychopathy by rebutting myths with sound scientific knowledge.
A tour-de-force accounting of the abuses of the prejudicial ‘psychopath’ diagnosis in court, this book additionally debunks several sacred cows in the research community—ultimately questioning whether psychopathy should be considered a legitimate scientific concept.
Reviews and media
- 2026 Forensic Talks, episode 113: Psychopathy Unmasked (opens in a new tab), 3D Forensics
- 2026 Can a test really tell who’s dangerous? (opens in a new tab), University of Toronto Magazine
- 2026 Dr. Rasmus Rosenberg Larsen on the PCL-R and the myth of the psychopath (opens in a new tab), The DNA of Things
- 2026 Review of Psychopathy Unmasked, by Hane Htut Maung (opens in a new tab), European Journal of Analytic Philosophy
- 2026 Psychopathy is more complicated than we think (opens in a new tab), The Varsity
- 2026 Exploring the evidence for psychopathy (opens in a new tab), The Forensic Psychology Podcast (Prison Radio Association)
- 2026 Psychopaths do not exist: The zombie idea explained (opens in a new tab), In Vivo with Tom Gabor
- 2026 Are psychopaths real? A review of the science says, no (opens in a new tab), CBC Ideas with Nahlah Ayed
- 2026 Research on psychopathy (opens in a new tab), The Curiosity Desk
- 2026 Everything you think you know about psychopaths might be wrong (opens in a new tab), Inc.
- 2026 Psychopaths don’t exist, scientist claims (opens in a new tab), Daily Mail
- 2026 No country for Chigurh, Lecter (opens in a new tab), The Times of India
- 2026 What if psychopaths aren’t real? (opens in a new tab), Think (KERA)
- 2026 Psychopathy, a zombie idea? (opens in a new tab), Cog Illusions
- 2026 Is psychopathy a zombie idea? (opens in a new tab), Lance Independent
- 2026 Are psychopaths as dangerous as the legal system believes? (opens in a new tab), In Good Health
- 2026 This made-in-Canada ‘psychopath test’ doesn’t work and has no place in courts, major study finds (opens in a new tab), Toronto Star
- 2026 Is the Psychopathy Checklist unsuitable for court? (opens in a new tab), Psychology Today
- 2026 Scepticism without synthesis: A review of Psychopathy Unmasked, by John Tully (opens in a new tab), The Journal of Forensic Psychiatry & Psychology
- 2026 Psychopathy test used in Canadian courts unreliable, prone to bias: Study (opens in a new tab), U of T News
- 2026 ‘An industrial scale of misapplication’: UTM research questions use of psych assessments in courts (opens in a new tab), UTM News
- 2025 The myth of the psychopath (opens in a new tab), The Last Show with David Cooper (CBC)
- 2025 Is there such a thing as a psychopath? (opens in a new tab), Big Brains (University of Chicago)
- 2025 Book challenges the psychopathy diagnosis in violent crime cases (opens in a new tab), The Marshall Project