Daniel Todd Gilbert is an American social psychologist and the Edgar Pierce Professor of Psychology at Harvard University. He is best known for his research on affective forecasting, conducted with Timothy Wilson of the University of Virginia, which examines how people predict their emotional responses to future events. Gilbert is the author of Stumbling on Happiness, an international bestseller that has been translated into more than 30 languages. The book won the 2007 Royal Society Prize for Science Books. Beyond his academic work, he has contributed essays to various newspapers and magazines, hosted a non-fiction television series on PBS, and delivered three popular TED talks.