How Immigration Changes a Country’s Intelligence | Dr. Garett Jones

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Mar 13, 2026

Dr. Garett Jones, economist at George Mason University and author of Hive Mind, explores how a population’s average cognitive ability shapes prosperity. He discusses national IQ versus individual IQ, how immigration composition affects long-term growth, culture-transplant effects, productivity peer effects, and when diversity helps or hinders economic performance.

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INSIGHT

National IQ Produces Large Economic Spillovers

A nation's average IQ creates large positive spillovers that matter far more than individual IQ effects on wages.
Garett Jones estimates a 1-point national IQ rise links to ~6% higher GDP per capita, versus ~1% per IQ point at individual wage level.

INSIGHT

Smarter Groups Are More Cooperative Over Time

Higher-IQ groups cooperate more in repeated prisoners' dilemma games, favoring win-win strategies over short-term grabs.
Jones links this to patience and perceptiveness enabling long-term pie growth in political economy and institutions.

INSIGHT

Patience Links Intelligence To Public Goods

Smarter people show greater patience, which raises savings rates and enables cooperation per the folk theorem of game theory.
Patience supports long-term public maintenance (sewage, infrastructure) and systemic investments that boost life expectancy and productivity.

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How intelligence shapes the prosperity of nations and why immigration policy can have long-term economic consequences? The conversation with Dr. Garret Jones explores the research behind national intelligence, cooperation, and economic growth. Garret explains how the average cognitive ability of a population influences productivity, institutional quality, and long-term development. We also discuss how immigration patterns interact with these dynamics and why the composition of immigration may matter more than the raw number of migrants. We also examine historical and modern examples that illustrate these patterns, including how immigration influences economic performance, how shared environments affect productivity, and why debates around diversity and immigration are often oversimplified in public discourse. Topics covered in this episode: – How intelligence affects national prosperity – Why some countries become richer than others – The relationship between immigration and economic growth – Selective immigration and high-skill migration – How shared environments influence productivity – The historical case of Argentina’s economic decline – Why the effects of diversity can vary across social groups This is part of the RIOT IQ Podcast, where we explore intelligence, cognition, and human potential through science, data, and serious conversation. If you found this episode valuable, consider subscribing for future episodes and sharing it with someone interested in intelligence, psychology, or human behavior. 📚Resources discussed in this episode: - Hive Mind: How Your Nation’s IQ Matters So Much More Than Your Own: https://amzn.to/4spjM8y - The Culture Transplant: How Migrants Make the Economies They Move To a Lot Like the Ones They Left: https://amzn.to/4ubo6tP - 10% Less Democracy: Why You Should Trust Elites a Little More and the Masses a Little Less: https://amzn.to/4ld6rhw 🧪 Curious about your own IQ? If you want to explore your own ability profile, you can take a free sample of the RIOT IQ test at https://www.riotiq.com.