I bought this book because I had enjoyed Haidt’s The Righteous Mind, and this book had good reviews on Amazon and elsewhere. There is a lot of material in this book that gets repeated in The Righteous Mind, including almost all of chapters 1 and 3. It also occasionally teeters on the irritating sides of positive psychology, though just about stays in the safe zone. Overall, though, I’d recommend skipping this book and just going for The Righteous Mind.