No Two Alike

The biggest mystery: Why do people differ so much in personality and behavior? Even identical twins who grow up together — same DNA, same parents — have distinct personalities, so it can't just be nature and environment. And if psychologists can't explain why identical twins differ, they won't be able to explain why each of us is unique. Why are there no two persons alike? Harris demonstrates that if a “detective” works with the right clue for identifying subtle indications of the real causes for human differences, he or she can challenge the reigning paradigm about human variation and “puzzle out” something entirely new – even paradigm-shifting. Harris falls in love with the puzzle; he becomes totally captivated by how everything fits together and proves to be a natural fit for the profession of detective work.