Robert Plomin

British-American behavioral geneticist at King's College London whose Blueprint argues that DNA is the most important predictor of psychological differences — and that shared environment (family upbringing) has virtually no lasting effect on personality, intelligence, or wellbeing.

Proposes based on decades of twin and adoption study data that the 'nature vs. nurture' debate has been settled — nature wins — and specifically that shared environmental factors (parenting style, socioeconomic status) have negligible lasting psychological effects, making DNA the primary factor in psychological outcomes.