Despite the many well-documented similarities - genetic, cognitive, behavioral, social - between our human selves and our evolutionary forebears, a significant gulf remains between us and them. Why is that? How did it come about? And how did we come to be the way we are? In this book fourteen distinguished scholars - including humanist, atheist, and theist voices - address such questions as they explore how and when human personhood emerged. Representing various disciplines, the contributors all offer significant insights into new scientific research about the origins of human nature - research that challenges some traditional views.