Dan Gilbert: Why are we happy? Why aren’t we happy?

Dan Gilbert, author of Stumbling on Happiness, challenges the idea that well be miserable if we dont get what we want. Our “psychological immune system“ lets us feel truly happy even when things dont go as planned. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers are invited to give the talk of their lives in 18 minutes -- including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosli