What keeps humans healthy and guarantees a long and fulfilling life? For decades, the answer to this question was scattered in opinions. People around the world debated whether it is a disciplined routine, a healthy diet or financial security. Surprisingly, Harvard researchers, through one of the longest running studies , have found the answer and it isn’t something most of us would expect, in fact, it is something many of us take for granted.

The Harvard Study of Adult Development began in 1938 and is described as the world's longest scientific study on happiness and health. The research originally spanned two groups and has now spanned more than 80 years. Researchers followed these participants as they aged, studying everything from medical records to personal interviews with their

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