TED Talks: Daniel Gilbert Asks Why are We Happy?

PHOTO: Dan Gilbert is seen in this undated file photo.

TED is a nonprofit organization devoted to Ideas Worth Spreading. At the TED conference, the world's leading thinkers and doers are asked to share a brilliant idea -- in 18 minutes. These talks are made available free online at TED.com.

ABC News is taking a deeper look into the remarkable work of TED speakers and their ideas, and features playlists of great TED Talks on ABCNews.com.

Daniel Gilbert, author of "Stumbling on Happiness," challenges the idea that we'll be miserable if we don't get what we want. Our "psychological immune system" lets us feel truly happy even when things don't go as planned.

TED is a nonprofit organization devoted to Ideas Worth Spreading. Find 1,000+ more video available free at TED.com. Follow TED on Twitter at @TEDNEWS

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