Most people think that happiness has four sources: the sensory pleasures (from art to chocolate), material wealth, romantic relationships, and children. But recent research suggests that much of what people think about happiness is wrong. Daniel Gilbert, author of “Stumbling on Happiness," hosts this symposium in which experts discuss what science has discovered about each of these sources: the sensory pleasures (Paul Bloom is the author of "How Pleasure Works"), material wealth (Tim Kasser is the author of "The High Price of Materialism"), romantic relationships (Eli Finkel is the author of "The All-Or-Nothing Marriage") and children (Jennifer Senior is the author of "All Joy and No Fun").