(Photo credit: TED / James Duncan Davidson)

On understanding happiness, Daniel Kahneman says we must distinguish between “the experiencing self” and “the remembering self.”

(Photo credit: TED / James Duncan Davidson)

Esther Duflo: “We cannot helicopter people out of poverty.”

(Photo credit: TED / Richard Lewis)

David Cameron says a post-bureaucratic world is emerging. Its three characteristics? Transparency, choice, accountability.

(Photo credit: TED / James Duncan Davidson)

Michael Shermer: “We don’t have to worry about global warming because the world’s going to end in 2012.”

(Photo credit: TED / James Duncan Davidson)

Jake Shimabukuro: “The ukulele is the instrument of peace.”