The Surprising Gene Shared By Criminals - Kathryn Paige Harden

Name: The Surprising Gene Shared By Criminals - Kathryn Paige Harden
Uploaded: 2026-03-27T15:00:23Z
Channel: Chris Williamson

March 27, 2026 | 1 product mentioned

Chris Williamson host

Kathryn Paige Harden guest

Watch on YouTube genetics and behavior criminal psychology x chromosome antisocial behavior maoa gene moral biology neurotransmitters

Kathryn Paige Harden discusses the genetic basis of antisocial behavior, exploring how the same genes affect both men and women but manifest differently due to biological and social factors. The episode centers on a striking case study of a Dutch family where a rare mutation in the MAOA gene on the X chromosome caused severe violent behavior in males while leaving females unaffected, raising important questions about the biological roots of morality and criminal behavior.

Key takeaways

• The same genetic liabilities for antisocial behavior affect both sexes equally, but males show higher rates of criminal behavior because they have greater physical capacity and social opportunity to enact violence.
• Men are more vulnerable to X-chromosome linked mutations because they have only one X chromosome, whereas women have two and can compensate with a functioning copy of the gene.
• A rare mutation in the MAOA enzyme—which breaks down neurotransmitters like serotonin and dopamine in the brain—caused extreme violent behavior in all males of one Dutch family while their sisters remained unaffected.
• The fact that a single genetic change can profoundly disrupt moral capacity demonstrates that morality is fundamentally a biological faculty, not purely a cognitive or spiritual one.
• Most people with serious antisocial behavior do not have the MAOA mutation, but the case suggests there may be other undiscovered genetic or neurobiological explanations for persistent violence in families that modern genomics has yet to investigate.
• Social factors like changing attitudes toward smoking and drinking have narrowed sex differences in substance use, revealing that the same underlying genes can produce different behavioral outcomes depending on environmental opportunity.