Psychopathy Unmasked

The Rise and Fall of a Dangerous Diagnosis

About the book

Cover of Psychopathy Unmasked
Publisher
The MIT Press
Published
17 June 2025
Pages
328
ISBN
978-0-262-55220-2
Website
psychopathyunmasked.com (opens in a new tab)

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.

Shadd Maruna, University of Liverpool; author of Making Good: How Ex-Convicts Reform and Rebuild Their Lives

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.

David DeMatteo, Professor of Psychology and Professor of Law, Drexel University

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.

John F. Edens, Professor of Psychological and Brain Sciences, Texas A&M University

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