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Transcript: What 85 Years of Research Says Is The Real Key To Happiness – Robert Waldinger

Read the full transcript of Harvard psychiatrist Robert Waldinger’s interview on The Big Think Interview on “What 85 Years of Research Says Is The Real Key To Happiness”, July 25, 2025.

Chapter 1: The 85 Year Quest to Understand Happiness

ROBERT WALDINGER: I’m Robert Waldinger. I am a psychiatrist and professor of psychiatry at Harvard Medical School. I direct the Harvard Study of Adult Development at Massachusetts General Hospital.

I became interested in psychiatry unexpectedly. I had never known a psychiatrist growing up, but when I was in medical school, I found that the way people’s minds worked was the most fascinating thing I could possibly study. So I eventually found that there was really nothing else for me in medicine but doing psychiatry.

I started out as an intern in pediatrics and I would see one ear infection after another and the kids were adorable. But one ear infection is pretty much the same as every other. Whereas when you talk to people about their lives, it’s never the same. And I knew that that would keep me interested for my whole career, which it has.

I am the fourth director of the Harvard Study of Adult Development and it is the longest study of adult life that’s ever been done. We’re in our 85th year. It started in 1938 as two studies that weren’t even aware of each other.

One study started at Harvard Student health service with 19 year old sophomores who were thought by their deans to be fine, upstanding young men. And the other study was a study of juvenile delinquency. And it selected boys middle school age from Boston’s poorest families, but also the most troubled families, families beset by problems like domestic violence and parental mental illness and physical illness.

This study set out to understand what makes people thrive as they grow and develop.