I'm not talking about a belief system. I'm talking about a life system. During the Great Depression, Harvard researchers began one of the longest studies on human life ever conducted. Eighty years, thousands of participants [were involved in the Harvard study]. They were seeking the answer to one what makes a a good life? Their answer was surprising. The key to happiness wasn't income. It wasn't fame. It wasn't status. (11:00–11:03)
CLAIM
Asserts that the Harvard study on human life lasted eighty years and involved thousands of participants.
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