Watch "Fareed Zakaria GPS," Sundays at 10 a.m. and 1 p.m. ET on CNN
Fifty years ago, a groundbreaking psychological experiment was conducted on preschoolers. It went something like this: The youngsters were put in a room where a marshmallow sat on a tray. They were told they could eat that one marshmallow immediately, or if they waited they would get a bigger reward: two marshmallows. So what did the kids do? What would you do? And what does the ability to wait mean for future success?
A lot, apparently. Fareed speaks with Walter Mischel, who was the brains behind this marshmallow experiment and has a new book out called The Marshmallow Test.
Watch the video for the full interview.