The question of Nature versus Nurture is at the center of a long-standing debate in biology about trade-offs between two competing factors that decide who we are as individuals: our environment (nurture) and our genetic make-up (nature). In Innate, Kevin Mitchell gives a readable yet detailed account of the relative contributions of genes, shared environment, and the confusingly named non-shared environment as the forces that shape each of us: in physique, personality, cognition, and so on.