Americans have never had more access to social technology. It’s easier to talk to friends and family members hundreds of miles away; easier to see their faces; and easier to find single people to date. But if you ask them, Americans today will say they are as lonely as or lonelier than any time on record. The amount of time all Americans spend alone has increased every year for about a decade.

What's going on?

Today’s episode is about the longest study on happiness in U.S. history — the Harvard Study of Adult Development. Our guests are the study's director and associate director, Robert Waldinger and Marc Schulz. They are the authors of a new book, 'The Good Life,' about what their study should teach all of us about the secret to a long and fulfilling life.

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26. An Interview with Sylvia Day