This table represents a serious challenge to traditional theories in psychology. Individual differences are largely a product of genes (A) and the non-shared environment (ENS). The shared family environment (ES) often has surprisingly little impact.
Nature, Nurture, and Random Chance: The two biggest factors shaping individual differences are genes and developmental noise. (!) See also 's book #Innate
Another paper makes the case that the "non-shared environment", the great unknown of behavioral genetics, may be largely traceable to chance events during prenatal development. More: Why children in the same family are so different
Population health scientists, behavioural geneticists (and even geneticists who can't behave, like ) should stop referring to the "non-shared environment" - it is a completely incorrect and confusing term. For a great recent read on this (££)
Nature x nurture x noise. Intrinsic stochasticity (or internal non-shared environment (NSE)) as key source of phenotypic variation