A landmark contribution to humanity's understanding of itself * The New York Times * A truly seminal book -- David Goodhart * Prospect * A tour de force - brave, brilliant, and eloquent. It will challenge the way you think about liberals and conservatives, atheism and religion, good and evil -- Paul Bloom * author of How Pleasure Works * Compelling . . . a fluid combination of erudition and entertainment -- Ian Birrell * Observer * Lucid and thought-provoking . . . deserves to be widely read -- Jenni Russell * Sunday Times * If you want to know why you hold your moral beliefs and why many people disagree with you, read this book -- Simon Baron-Cohen * author of The Essential Difference *