Book excerpt: Sexting. Cyberbullying. Narcissism. Social media has become the dominant force in young people's lives, and each day seems to bring another shocking tale of private pictures getting into the wrong hands, or a lament that young people feel compelled to share their each and every thought with the entire world. Drawing on a large-scale survey and interviews with students on thirteen college campuses, Freitas finds that what young people are overwhelmingly concerned with--what they really want to talk about--is happiness. The Happiness Effect is an eye-opening window into their first-hand experiences of social media and its impact on them.