"There's research that shows that as a rule people get happier as they get older. Dr Robert Waldinger clinical professor of psychiatry at Harvard Medical School is sixty five by the way. Absolutely. And for years and years. He says science had no way to explain what doors lessening was talking about. That is why many people get happier as they get older. Yes. Because trying to do a study tracking the entire scope of a human life is actually a really hard thing to do. Right. They're really hard to do. They take tremendous persistence. A funding is always about to dry up. The investigators get distracted there. So many reasons why most most longitudinal studies fall apart before the ten year Mark, which is why it's so. Amazing that since the nineteen thirties. A group of scientists at Harvard led most recently by rubber Waldinger have been working on something called the Harvard study of adult development, and it's the longest study of adult life ever done detailed systematic study of seven hundred men over seventy five years of life looking at every aspect of their health, physical health, mental health work life relationship functioning, and then as people have gotten older, aging retirement and all in an effort to figure out what was it again. It was originally the Harvard part was funded by W T grant, the department store magnate because he wanted to know what the characteristics were that made for good department store managers. Wow. That was that was his interest in funding future department store managers. He was man. Okay. But after that the study went on and on and eventually became what it is today. Seventy eight years later and unprecedented source of scientific wisdom about what it takes to thrive in old age rubber Waldinger described the study and its results on the Ted stage since nineteen thirty eight. We've tracked the lives of two groups of men the first group started in the study when they were soft Moore's at Harvard college they all finished college during World War Two. And then most went off to serve in the war. And the second group that we've followed was a group of boys from Boston's poorest neighborhoods. Most lived in tenements many without hot and cold running water to get the clearest picture of these lives. We interview them in their living rooms, we get their medical records from their doctors, we draw their blood. We scan their brains. We talked to their children. We videotape them talking with their wives about their deepest concerns and win about a decade ago. We finally asked the wives if they would join us as members of the study, many of the women said, you know, it's about time. So what have we learned from the tens of thousands of pages of information that we've generated on these lives?"