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Peterson Reports Identical Twins' IQs Converge With Age Regardless of Environment

Jordan B. Peterson Podcast · 572. Navigating Education, Ideology, and Children | Answer the Call · May 24, 2026
Peterson Reports Identical Twins' IQs Converge With Age Regardless of Environment
Jordan B. Peterson Podcast
Jordan B. Peterson Podcast
572. Navigating Education, Ideology, and Children | Answer the Call
"If you take twins, identical twins separated at birth, and you test them repeatedly for IQ as they age, what you'd expect is that their IQs would get more different as their experiences diverge. That isn't what happens. What happens is that as they age, their IQs get more similar until regardless of how they were raised, by the time they're 60, if you test one twin and the other, they're so similar that it's like you test the same person twice."
Jordan Peterson described research showing that identical twins separated at birth show increasingly similar IQs as they age, with near-identical scores by age 60 despite different upbringings. This counterintuitive finding contradicts expectations that divergent environments would produce different cognitive outcomes. Peterson used this to illustrate the extreme stability of IQ across the lifespan and the limited role of environment in determining intelligence.

About this episode

In this episode of Answer the Call, Jordan Peterson and his daughter Mikayla Peterson field live questions from callers on navigating the modern education system, with Peterson delivering several controversial assessments about American schooling and human intelligence. Peterson stated that the K-12 education system is likely irredeemably corrupt, citing rising incompetence combined with ideological pathology, and advised parents to take greater responsibility in assessing educational quality. Throughout the conversation, Peterson made striking claims about IQ research, asserting there is no reliable evidence that intelligence can be increased despite decades of attempts, and citing the failure of programs like Head Start to produce lasting cognitive gains. He described research showing identical twins' IQs converge with age regardless of environment, and stated there is zero correlation between intelligence and moral character traits like conscientiousness. The episode addressed multiple callers considering homeschooling, with Peterson and Mikayla emphasizing the importance of socialization, character development over pure academic achievement, and parental involvement in children's education. Peterson argued most teachers have no idea why they teach what they teach, particularly recalling his own experience with mathematics educators who could not explain the purpose of their lessons. He stressed that effective teaching requires setting a motivational frame and dramatizing why material matters, comparing great teachers to performers who act out moral commitment to their subject. The conversation ranged from practical homeschooling advice and recommendations for alternative schools like Acton Academy to philosophical discussions about the nature of learning, the role of beauty and art in education, and the relationship between intelligence, character, and human development. Peterson emphasized that intelligence is a responsibility rather than a virtue, warning that high IQ without character can be destructive.

Key takeaways

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