Daniel Todd Gilbert (born November 5, 1957) is an American social psychologist and writer. He is the Edgar Pierce Professor of Psychology at Harvard University and is known for his research with Timothy Wilson of the University of Virginia on affective forecasting. He is the author of the international bestseller Stumbling on Happiness, which has been translated into more than 30 languages and won the 2007 Royal Society Prizes for Science Books. He has also written essays for several newspapers and magazines, hosted a non-fiction television series on PBS, and given three popular TED talks. Life and career Gilbert dropped out of high school at age 15, and spent a year hitchhiking around the United States. He later earned his GED and received a Bachelor of Arts in psychology from University of Colorado Denver in 1981 and a PhD in social psychology from Princeton University in 1985. From 1985 to 1996, he was a faculty member at the University of Texas at Austin. Since 1996, he has worked at Harvard University where he is currently the Edgar Pierce Professor of Psychology. He and his wife, Marilynn Oliphant, live in Cambridge, Massachusetts. Gilbert has one son and three grandchildren. Works Gilbert's 2006 book, Stumbling on Happiness was a New York Times bestseller and has been translated into more than 30 languages. It won the 2007 Royal Society Prizes for Science Books and was included as one of fifty key books in psychology in 50 Psychology Classics (2006) by Tom Butler-Bowdon. Gilbert's non-fiction essays have appeared in The New York Times, Los Angeles Times, Forbes, Time, and others, and his short stories have appeared in Amazing Stories and Isaac Asimov's Science Fiction Magazine, as well as other magazines and anthologies. He has been a guest on numerous television shows including 20/20, The Today Show, Charlie Rose, and The Colbert Report. He is the co-writer and host of the 6-hour Nova television series "This Emotional Life" which aired on PBS in January, 2010, and won several Telly Awards. He has given three popular TED talks, including one of the 25 most-viewed talks of all time (as of November 2022). Beginning in 2013, Gilbert appeared in a series of Prudential Financial television commercials that used data visualization to get Americans to think about the importance of saving for their retirements. For example, in one advertisement, people were asked to put stickers on a time-line