Here is a taste:
IQ hereditarian and race-science arguments in favor of genetic explanations of ethnic group IQ differences are false for many reasons critics have outlined since the 1969 Jensen controversy and earlier. In addition, I have argued that quantitative genetic family, twin, and adoption studies have failed to produce valid evidence that genetic factors influence within-group IQ or intelligence differences; that DNA-based studies have failed to identify causal genes; and that EA and cognitive genetic determination coefficients are low.
The above conclusions by themselves should put IQ hereditarians and race science supporters out of business. Yet they remain in business largely because wealthy patrons and the corporate media support and amplify their claims in the outlets they own, on social media, and elsewhere. At the risk of igniting a race war and anti-immigrant pograms, the world’s billionaires want the rest of us to fight each other instead of uniting to fight them. Promoting IQ hereditarianism and race science helps them accomplish this goal. In his 8/21/2026 Wall Street Journal article, Nathan Cofnas wrote, with apparent approval, that “finding every lie that Arday told since childhood became a national sport. U.K. newspapers published 249 articles about him in a 22-day period.” Imagine if U.K. newspapers turned “finding every lie” in their government’s foreign policy statements into a national sport.
Most people who believe that twin and adoption studies have established the importance of genetic influences on intelligence are neither IQ hereditarians nor race science supporters. However, these latter groups need these studies like a fish needs water. They rely on them to support their (often right-wing) political agendas, while dismissing the spectacular failures of DNA-based research. IQ hereditarian and race science claims are not backed by science, but only by ideology, beliefs, prejudice, and sometimes financial gain (often referred to in the social media as “grifting”).
