Short Synopsis
Why do people—even identical twins reared in the same home—differ so much in personality? Armed with an inquiring mind and insights from evolutionary psychology, Judith Rich Harris sets out to solve the mystery of human individuality.

Full Synopsis
Why do people—even identical twins reared in the same home—differ so much in personality? Armed with an inquiring mind and insights from evolutionary psychology, Judith Rich Harris sets out to solve the mystery of human individuality.