MODERN WISDOM #1066 — Dr Kathryn Paige Harden
The Genetics of Evil: Are People Born Bad?
[March 2, 2026 | Host: Chris Williamson | Guest: Dr Kathryn Paige Harden]
Episode Overview
In this deeply engaging and wide-ranging episode, Chris Williamson is joined by Dr Kathryn Paige Harden, clinical psychologist, professor, and author, to explore the vexing questions at the intersection of genetics, behavior, morality, and society. The conversation delves into the genetic underpinnings of “evil” and antisocial behavior, examines the limits of free will, discusses individual responsibility, justice, punishment, and restoration—and tackles how genetic perspectives challenge cherished cultural narratives about blame, punishment, and human nature.
Key Discussion Points & Insights
1. The Public Response to Genetic Research
[00:00–05:20]
- Harden describes the polarized aftermath of her previous book: warm, grateful responses from ordinary readers, but significant backlash and "villainization" by some fellow academics.
- She reflects on how deeply people’s lives and identities are affected by learning about genetic influence, and how misunderstood her work can become.
"It was a wild time... I felt like some people needed to turn me into a villain in order to get their own message out... There's something very alienating and disorienting about feeling like you're talking, but people are deliberately not hearing you." (B, 00:04–02:13)
- Harden draws on her father's advice about receiving 'flak when you're over the target' to suggest that genetics touches profoundly personal—and therefore controversial—social territory.
2. The Genetics of Risk-Taking and Bad Behavior
[05:28–12:09]
- Dr. Harden discusses a major study involving 4 million individuals’ DNA, investigating genes associated with risk-taking behaviors (e.g., ADHD, early or atypical sexual activity, substance use, etc.).
- Explains how these behaviors are connected by disinhibition—acting against social or internalized rules, seeking reward, and tolerating risk.
"[We asked] can we find genes that are generally involved in being a risk taker?... There’s nothing magical about those seven behaviors—they just happen to be the ones in which we had enough data." (B, 06:29)
- Her research found that certain genetic variants are overrepresented in those who exhibit a propensity for risk across multiple domains.
- Ties research origins to her own upbringing (fundamentalist religious environment, then working in mouse models of addiction), and describes the paradigm shift from seeing substance use as moral failing to as (partly) biological.
3. Evolutionary Roots of Aggression, Impulsivity, and Deviance
[11:59–19:38]
- Discussion of the evolutionary psychology behind self-domestication in humans vs. primates: less aggression, more cooperation, but always some need for risk takers and outliers.
- Observes that entrepreneurs, for instance, are more likely to have engaged in "mild delinquency" as teenagers.
- The same spectrum of genetic variance that at its extreme may be maladaptive—e.g., schizophrenia or risk-taking—at lower levels can underlie creativity, innovation, and social advancement.
"Genes that are associated with schizophrenia... at lower levels, you see people who are more likely to be artists, engineers, musicians... To the extent that these genes that are 'disease genes' are also predisposing people towards art and creativity, that's going to keep them around in the human gene pool for longer." (B, 17:15)
4. Genetics, Free Will, Agency, and Blame
[25:04–30:59]
- The discussion transitions to philosophical territory: do genetic predispositions undermine notions of free will and responsibility?
- Both agree that the free will/determinism debate, while intellectually fascinating, is less helpful than examining how society actually assigns blame and designs justice systems.
- Harden proposes separating accountability (protecting society, changing behavior) from punishment-as-suffering-for-its-own-sake.
“I don’t think anyone deserves to suffer… That doesn’t mean we have no rules; we pull those two things apart.” (B, 63:36)
5. Heritability of Antisocial Behavior—The “Genetics of Evil”?
[31:06–43:05]
- Antisocial behaviors (rule-breaking, cruelty, violence) in children can be as heritable as schizophrenia; particularly when coupled with low empathy ("callous-unemotional traits"), heritability estimates reach ~80%.
- The most severe cases—those not explained by adverse environment—are also the hardest to treat.
“Children who hurt others, break rules, upset their parents, and don’t feel bad about it... that's the most heritable kind of subtype of conduct problems.” (B, 32:05)
- Not all antisocial behavior is heritable; it’s lowest for kids whose antisociality stems from trauma, maltreatment, or environmental chaos.
- Discusses societal gut reactions (avoidance, harshness, “controlling that which we cannot trust”) and how these may backfire for genetically predisposed kids: harsh punishment can escalate, not mitigate, behaviors.
6. From Childhood to Criminal Justice: Culpability and Moral Intuitions
[43:05–53:59]
- The “problem” intensifies as these children become adults: when do we treat someone as responsible for their actions? At what age is someone truly culpable?
- Harden points to the confusion around legal systems’ treatment of child offenders (e.g., school shooters, child soldiers, the limits of “insanity” or “mitigation” pleas).
- Holds up recovery from addiction as a model of practical philosophy—simultaneous radical compassion and taking whatever agency one can muster.
7. The Paradox of Genetic Evidence in Court & Society
[73:40–80:01]
- In the court system, environmental explanations for criminal behavior (abuse, neglect) tend to reduce punishment; genetic explanations often do not and can even make judges/juries more punitive (“If badness is in the genes, the risk can never be mitigated”).
“People reason about the genetic and environmental causes differently… with genetics, you see more retribution.” (B, 79:03)
- This points to problematic “genetic essentialism”—the idea that your genes are your “true” nature, and thus being “bad to the bone” renders you irredeemable.
8. Punishment, Retribution, and the Biology of Justice
[87:03–110:38]
- Retribution (the desire to make wrongdoers suffer) emerges early in childhood and is, Harden argues, “a cooperation enforcement mechanism”—reward circuits fire when we see defectors punished.
- Empathy is painful; retribution alchemizes pain into reward—explaining the pleasure people may feel at the suffering of defectors/outsiders.
"Empathy is painful...but if that person was a wrongdoer, I could alchemize that pain into pleasure." (B, 91:30)
- Harden uses the case of the Norwegian mass shooter Anders Breivik to contrast American and Nordic attitudes to punishment and the collective reckoning with “Who is one of us?”
- Both she and Chris wrestle with the difficult, unsatisfying remainder after even the “best” justice system: “There is no perfect response to harm... but how we act in our worst moments reveals what we value most as a society.” (paraphrased)
9. The Limits of Science for Individual Biography
[112:58–117:08]
- Harden shares correspondence with a violent Texas prisoner reflecting on whether he was “born bad”, highlighting how individuals seek meaning, hope, and story—beyond probabilities or averages.
- The question beneath the science: “Was it all my fault? Can I change? Am I okay? Does science help me answer that?”
10. Epigenetics & Generational Transmission
[118:16–129:10]
- Harden briefly explains epigenetics (heritable chemical modifications "on top" of DNA) and the ongoing debate about the reality and significance of epigenetic inheritance in humans.
- Discusses evidence (e.g., Dutch famine) that extreme in utero stress can create marks that last generations, but cautions against overinterpretation or extrapolation.
- Notes that the biggest flux in plasticity—genetic, epigenetic, behavioral—is in childhood: “childhood is our period of peak plasticity.”
11. Embryo Selection & Genetic Inequality
[133:45–149:42]
- Embryo selection raises profound ethical questions—not just about avoiding disease, but the effects on society’s fabric, definitions of normality, and collective solidarity.
- Harden notes dual reactions: as a mother, she wants to reduce her child’s suffering; but as a citizen, she worries about the stratification of choice and the social pressure it creates (“If you could have chosen, why didn’t you?”).
"How does turning a matter of chance—a roll of the genetic dice—into a matter of choice change the way we see one another in society?" (B, 136:37)
- Examines the “crumbling genome” idea (are we accumulating mutations by softening selection pressures?), but is skeptical about framing evolution as unidirectionally “progressive.”
- On drawing lines for “fit for the world”: any attempt to eliminate all “risk” from the gene pool might yield a society lacking in diversity and progress.
12. Gender, Socialization, and Modern “Domestication”
[156:44–168:47]
- Considers whether modern society (“domesticated”, less tolerant of dominance/aggression) asks men to be further from their set point than women—i.e., if the emotional/behavioral self-restraint demanded of men is a hidden cost, comparable to women’s “double shift.”
- Harden is cautious: sex differences exist, but overlap is large and extremes account for much perceived difference.
- Is it fair? The deeper question is, what kind of society are we designing, “if you didn’t know what hand you’d be dealt?”
13. Looksmaxing Culture, Mate Value, and Loneliness
[169:23–179:45]
- Harden finds the “looksmaxing” movement (men using sometimes extreme means to enhance attractiveness) both ironic (it can undermine fertility) and nihilistic.
- With less in-person socialization and more “display” online, modern culture elevates show over substance, yet evolutionary pair-bonding is built on competence, cooperation, and genuine connection—not mere signals.
- Harden’s personal take: career/education level matter little to real relationship satisfaction compared to competence and contribution, but acknowledges average trends toward assortative mating.
14. Motherhood, Luck, and the Ethics of Design
[130:15–144:39]
- Harden sees parenting as "the most optimistic gamble," a lesson in chance, humility, and relinquishing control: “No children are reproduced; children are produced… each child is a unique roll of the genetic dice.” (B, summarizing Andrew Solomon, 131:43)
- She wrestles with how much to intervene: “Motherhood means meeting a person as they are, not as a project to perfect.”
Notable Quotes & Memorable Moments
- On the agony of misrepresentation: "When someone says, she said X, when I literally had said the exact opposite... there's something very alienating about feeling like you are talking, but people are deliberately not hearing you." (B, 02:13)
- On luck and blame: "The luck of having your genes, your parents, of how those combine, the choices you make before you know the ramifications—those shape who you are. And so that person might experience themselves as freely choosing. But the chooser is profoundly shaped by factors outside their control." (B, 25:12)
- On the hardest kids to help: "Parents say, my kid is aggressive and my kid doesn't feel bad about the fact they’re aggressive. That is the form for which we have the fewest effective treatments." (B, 33:20)
- On retribution: "We experience dopamine being released... when we see someone who's been portrayed as a wrongdoer being made to suffer. Empathy is painful; retribution can alchemize that pain into pleasure." (B, 88:02–91:30)
- On the Norwegian justice approach: "This person did a horrible thing. We have our maximum retributive impulses, but he is still one of us... Our response to our most antisocial people can bring out the most callous instincts of ourselves." (B, 101:17–102:44)
- On parental humility: "No children are reproduced. Children are produced... It's a miracle we ever met." (B, 130:15–133:45)
- On genetic determinism and essentialism: "Genetic essentialism is not you were shaped by luck, but you are a bad person, bad to the bone." (B, 84:46)
- On behavioral change and agency: "You can say, 'my sins are the genetic part, but my willpower is not.' But both your smoking and your quitting come from your genetics. Even your belief in free will is heritable." (B, 51:19)
Timestamps for Key Segments
- 00:00–05:20 — Harden discusses reaction to her last book and academic controversy
- 05:28–12:09 — Risk-taking genes: 4-million person study, ADHD and behaviors
- 11:59–19:38 — Evolutionary roots of deviance, advantages and risks
- 31:06–35:14 — Heritability of antisocial behavior in children
- 43:05–53:59 — Culpability, the age of responsibility, and legal tensions
- 73:40–80:01 — How jurors and judges interpret genetic vs. environmental explanations
- 87:03–93:55 — Punishment, pleasure of retribution, empathy, and scapegoating
- 130:15–133:45 — On luck, motherhood, children as unpredictable creations
- 133:45–149:42 — Embryo selection, Down syndrome, and social consequences
- 156:44–168:47 — Gender, modern expectations, and hidden costs for men
Style & Tone
The conversation is engrossing, earnest, and at times vulnerable—marked by intellectual rigor, compassion, and humility. Harden is forthright about scientific complexities, personal discomforts, and the deep ethical tensions new biotechnologies raise, while Chris blends curiosity with humor and challenging questions.
Final Thoughts
This episode serves as a profound examination of the ways genetics, environment, luck, and human choice intermingle in shaping behavior—and thus society’s approach to “evil,” responsibility, and justice. Dr. Harden’s nuanced views challenge binary thinking, urging deeper humility and compassion in how we think about ourselves, each other, and the systems that govern life, blame, and forgiveness.
Recommended for listeners interested in psychology, philosophy, genetics, justice, bioethics, and anyone wrestling with the question of why people do bad things—and what we should do about it.