Modern WisdomWhy Is Behavioural Genetics A Hated Science? - Dr Stuart Ritchie
At a glance
WHAT IT’S REALLY ABOUT
Why Behavioral Genetics Alarms People: Politics, Fairness, And Bad Science
- Stuart Ritchie explains why behavioral genetics provokes hostility, arguing that people wrongly equate genetic influence with immutability and right‑wing politics, especially around traits like intelligence and education. He shows how genes and environments interact, using examples from post‑communist Estonia, eyesight and height, and school quality to illustrate that heritable traits are still malleable. Ritchie then details how behavioral genetics was an early casualty of the replication crisis—especially the complete collapse of ‘candidate gene’ studies—and how newer genome‑wide methods, while better, still face scientific and sampling challenges. The conversation broadens into how to interpret contested findings in psychology and medicine (mindsets, priming, antidepressants, ECT), and how the public can be properly skeptical of research without sliding into conspiracy thinking.
IDEAS WORTH REMEMBERING
5 ideasGenetic influence is not destiny; heritable traits can still be changed by environments.
Ritchie emphasizes that high heritability does not mean a trait is fixed—myopia is strongly genetic yet trivially altered with glasses, and height is highly heritable but dramatically reduced by malnutrition, as seen in North vs. South Korea.
People apply a double standard to genetics depending on how politically sensitive the trait is.
Most accept genes for height or eye color but react angrily when the same methods show genetic influence on intelligence, personality, or educational attainment, largely because of fears about inequality, determinism, and past eugenic abuses.
Behavioral genetics was badly misled by ‘candidate gene’ studies that mostly failed to replicate.
For years, large swaths of the field claimed single genes explained big chunks of traits like memory or depression; large‑scale replications showed ~99% of these findings were false, forcing a pivot to genome‑wide association studies that reveal thousands of tiny genetic effects instead.
Newer genetic methods are more robust but still limited and biased.
Genome‑wide studies and polygenic scores reliably detect small genetic effects, yet are heavily based on European‑ancestry samples and are confounded by factors like assortative mating, so their predictive power drops in other populations and requires cautious interpretation.
Many fashionable psychological constructs are rebrands of older, well‑known traits.
Concepts like grit and emotional intelligence do predict outcomes, but meta‑analyses show they are largely repackaged conscientiousness or combinations of IQ and personality, with little truly new explanatory power despite heavy popularization.
WORDS WORTH SAVING
5 quotesPeople have this strange double standard: they’re happy with genes for height, but the moment you use the same methods on intelligence or education, they flip out.
— Stuart Ritchie
Candidate gene research built whole careers and spent millions, and about 99% of it was nonsense.
— Stuart Ritchie
High heritability doesn’t mean immutability—myopia is very heritable, and we change it instantly with a pair of glasses.
— Stuart Ritchie
If you didn’t know what traits you were going to have, how would you set up a fair world? That’s the Rawlsian, progressive way to think about genetics.
— Stuart Ritchie (paraphrasing Paige Harden/Rawls)
Our number one job as scientists is to get to the truth, not to jazz up findings because a more exciting story is easier to sell.
— Stuart Ritchie
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