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How Genes Shape Your Risk Taking & Morals | Dr. Kathryn Paige Harden

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Feb 9, 2026

Guest

Kathryn Paige Harden

Dr. Kathryn Paige Harden, psychologist and behavioral geneticist at UT Austin and author of Original Sin, discusses how genes and upbringing shape risk-taking, impulsivity, addiction, and moral behavior. She covers puberty timing, sex differences in impulse control, genetics of antisocial behavior, ethical questions around genetic information, and how society balances responsibility, punishment, and rehabilitation.

02:42:17

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Episode notes

Punishment Feels Like Reward

Humans derive pleasure from seeing perceived wrongdoers punished, driven by reward circuits in the brain.
Kathryn Paige Harden links this to a deep, evolved enforcement of cooperative norms that feels like a reward.

Adolescence Shapes Lifelong Trajectories

Adolescence (roughly ages 10–25) is when many mental illnesses and life trajectories emerge and canalize.
Harden studies how genes and family environments interact during this period to shape long-term outcomes.

Puberty Timing Predicts Later Health

Pubertal timing and tempo have different effects: earlier timing in girls links to health risks, rapid tempo in boys links to emotional difficulty.
Epigenetic clocks tied to puberty correlate with faster biological aging and shorter lifespan.

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Why study adolescence for genes and outcomes

03:11 • 50sec

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Defining adolescence and its developmental window

04:01 • 4min

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Pubertal timing, epigenetic clocks, and lifespan

08:16 • 5min

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Puberty, cognition and plasticity nuances

Family structure and puberty timing debates

16:34 • 3min

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Communicating sensitive genetic findings

19:22 • 3min

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Seven deadly sins reframed as disorders

22:45 • 5min

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Polygenic architecture and neurodevelopment

28:05 • 3min

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Mechanisms linking genes to addiction and impulsivity

31:08 • 5min

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Genes, trauma, and intergenerational risk

36:11 • 3min

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Should we return polygenic risk to people?

Genetic information can reshape identity

49:54 • 2min

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Are people born 'bad'—origins of moral narratives

52:12 • 3min

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Early-onset antisocial behavior and prognosis

55:32 • 10min

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Whitman case and biological causes of violence

01:05:16 • 7min

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Responsibility, bad luck, and accountability

01:11:50 • 3min

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Genetic recombination and breaking harmful cycles

Adaptive value of disagreeable traits

01:27:21 • 9min

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Relational aggression, sex differences, and development

01:36:30 • 8min

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Sex differences in sensation seeking and impulse control

Punishment, reward, and what works to change behavior

01:55:56 • 9min

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Cruelty as currency and enforcement of fairness

02:04:31 • 6min

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Forward-looking justice and cycle repair

02:10:13 • 7min

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Online outrage, group norms, and local action

02:17:19 • 12min

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Closing reflections and optimism

Original Sin: On the Genetics of Vice, the Problem of Blame, and the Future of Forgiveness

on the Genetics of Vice, the Problems with Blame, and the Future of Forgiveness

Kathryn Paige Harden

Original Sin is a revelatory inquiry into the intersection of human behavior and inherited biology, challenging traditional notions of vice, blame, and forgiveness. Acclaimed psychologist Kathryn Paige Harden examines the genetic influences on human traits, urging a more humane vision of moral responsibility and punishment. The book draws on scientific insights to rethink how society approaches accountability in light of genetic predispositions.

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Protocols: An Operating Manual for the Human Body

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Protocols provides simple, powerful, and evidence-based solutions to life’s most common challenges. Designed to improve your mental health, physical health, and performance, these guidelines are customizable, allowing you to adapt them to your specific needs. With his clear and engaging style, Dr. Huberman explains the scientific principles behind each protocol and how they can deliver immediate, effective results. Protocols is your essential road map for achieving optimal health.

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Finding Balance in the Age of Indulgence

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In 'Dopamine Nation,' Dr. Anna Lembke delves into the scientific discoveries that explain why overindulgence in high-reward, high-dopamine stimuli leads to pain. The book combines personal narratives from her clinical practice with the latest psychology research to illustrate how to find contentment and connectedness by keeping dopamine in check. Lembke discusses the impact of modern addictions, such as those related to smartphones, food, and other behaviors, and provides strategies for managing consumption and transforming lives. The book emphasizes the importance of balancing the science of desire with the wisdom of recovery.

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I Know This Much Is True is a powerful novel by Wally Lamb that explores the complex relationship between identical twin brothers, Dominick and Thomas Birdsey. Thomas suffers from paranoid schizophrenia, while Dominick struggles with his own life and past traumas. The story delves into themes of family, mental illness, forgiveness, and redemption, weaving together multiple narratives across generations. The novel is set in the fictional town of Three Rivers, Connecticut, and incorporates elements of magic realism through the grandfather's memoir.

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One of us

Michael Marshall Smith

Dr. Kathryn Paige Harden, PhD, is a psychologist, behavioral geneticist and professor of psychology at the University of Texas at Austin. We discuss how genes interact with your upbringing to shape your level of risk-taking and morality. We also discuss how genes shape propensity for addiction and impulsivity in males versus females. Finally, we discuss how biology impacts societal views of sinning, punishment and forgiveness.

Read the episode show notes at hubermanlab.com.

Pre-order Protocols: https://go.hubermanlab.com/protocols

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Timestamps

(00:00:00) Kathryn Paige Harden

(00:03:10) Adolescents, Genes & Life Trajectory; Adolescence Ages

(00:06:44) Puberty, Aging & Differences; Epigenome; Cognition