Culture as the Third Factor

Beyond nature (genes) and nurture (individual upbringing), culture is a separate, broader layer of social influence that evolves independently and resists narrow policy interventions. Kling frames culture as an outer circle that shapes group behavior and is harder to change than individual nurture, meaning many social policies will fail if they ignore this macro social evolution. — Treating culture as a distinct variable reframes policy debates (crime, education, welfare) because it explains why targeted interventions often underperform and why debates about genetics become politically fraught.