An important piece of evidence that contradicts the assertion that family-level environments shared by children raised in the same home (c2) do not "make a difference" for life outcomes.

193K twins from 16 countries. c2 = 31% for educational attainment. https://www.nature.com/articles/s41598-020-69526-6

Very similar results as an earlier meta-analysis by Branigan et al in 2013: https://www.scholars.northwestern.edu/en/publications/variation-in-the-heritability-of-educational-attainment-an-intern

Twin studies actually give us some of the strongest evidence that ENVIRONMENTS that DIFFER SYSTEMATICALLY BETWEEN FAMILIES are important drivers of inequality in education

Why do high-profile popularizers of behavior genetics just straight up ignore that fact?

a rhetorical question, obviously. we know why -- using genetics to wave away people's responsibility to care about other people will always be in fashion