world affairs website, the global public square blog. there you'll find extra interviews with guests from the shows, posts on events of the day by me and friends of the show. our hope is that it will truly become a global public square where you and i can have an ongoing dialogue. you can find it where you've always found our website, cnn.com/gps. this week's book of the week is david brooks' "the social animal" brooks is a columnist for "the new york times." but don't pick up the book expecting the usual political analysis. it's not that at all. this is a profound meditation on what motivates human beings. what makes them win, what makes them succeed, what makes them love, what makes them relate to each other. it's a lot of neuroscience, very well presented. wonderfully written. time now for the last look. have you seen this guy? odds, you have. it's what national geographic says is the most common face on the planet. what does that mean?