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The Good Fight

Kathryn Paige Harden on How Genetics Shapes Human Behavior

The Good Fight

Yascha Mounk

News

4.7963 Ratings

🗓️ 30 May 2026

⏱️ 62 minutes

🧾️ Download transcript

Summary

Yascha Mounk and Paige Harden discuss twin studies, heritability research, and why genetic influence varies across different traits and populations. Kathryn Paige Harden is a professor in the Department of Psychology at the University of Texas at Austin, where she leads the Developmental Behavior Genetics lab and serves as Director of Clinical Training. Her latest book is Original Sin: On the Genetics of Vice, the Problem of Blame, and the Future of Forgiveness. In this week’s conversation, Yascha Mounk and Paige Harden discuss why twin studies reveal the substantial influence of genetics on human behavior, how genetic effects actually increase rather than decrease over a person’s lifetime, and why acknowledging genetic influences shouldn’t be seen as incompatible with progressive politics. Watch this conversation on our ⁠YouTube Channel⁠! If you have not yet signed up for our podcast, please do so now by following ⁠this link on your phone⁠. Email: leonora.barclay@persuasion.community Podcast production by Jack Shields and Leonora Barclay. Connect with us! ⁠Spotify⁠ | ⁠Apple⁠ | ⁠Google⁠ X: ⁠@Yascha_Mounk⁠ & ⁠@JoinPersuasion⁠ YouTube: ⁠Yascha Mounk⁠, ⁠Persuasion⁠ LinkedIn: ⁠Persuasion Community Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

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0:06.8

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0:13.5

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0:18.0

I think that can be part of the sort of implicit negative reaction to genetics is we love control. And thinking about this factor that's not fully within our control can be, again, it's both liberating and horrifying in equal measure. And now the good fight with Yasha Monk.

0:43.5

To what extent is our behavior determined by genetic influences?

0:51.0

Are many social outcomes downstream from the genes we have? Or do they depend on things like our

0:57.8

parents' wealth, the kind of household we grew up in, the kind of opportunities we had? And why

1:03.6

are so many people resistant to looking at the scientific evidence that comes from things like twin studies,

1:12.9

which do seem to suggest that one important component of these outcomes is driven by genetics.

1:19.2

Why more broadly is much of that work right-coded?

1:21.8

Why do people tend to assume that when you look at genetic influences on behavior, you must be favoring right-wing policies

1:31.4

to deal with questions of education or social ills like crime.

1:36.6

Well, the best scholar who has thought about these topics and who combines an emphasis on

1:42.7

the genetic influences on our behavior with left-wing political

1:47.5

commitments around questions like education and crime is Catherine Page Harden.

1:53.2

Page is Professor of Psychology at the University of Texas at Austin, and she is the author

1:59.9

of two really interesting books for The Genetic Lottery,

2:02.8

Why D&A Matters for Social Equality, which came out about five years ago and was widely

2:07.4

discussed, and a new book called Original Sin, How We Became Evil and What We Can Do About It.

2:14.4

And the last part of this conversation, we really go deep into questions of how to

2:19.6

grapple with the genetic influences on evil behavior. If there is no such thing as free will,

2:28.9

does that undermine the extent to which we should judge our friend for treating us poorly, or to which we

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