Genetic roots of IQ and socioeconomic success revealed

A twin-based analysis from the TwinLife project finds that genetic factors largely explain the link between cognitive ability and future SES. Cognitive ability is about 75% heritable; genetic factors account for roughly 49–66% of educational attainment and 32–71% of occupational status. The association between early cognitive ability and later SES is predominantly driven by shared genetics (69–81% for education, up to 98% for occupation). Environmental factors overlap far less. The results imply biology heavily shapes life outcomes, though heritability is not destiny, and the study’s four-year window and simplified models warrant cautious interpretation. Policymakers should consider genetic influences when designing interventions to reduce inequality.