Robert Waldinger is a psychiatrist and the director of a unique longitudinal study called the Harvard Study of Adult Development.  This study is different than others in that it has continued to examine people across a 75 year span.  With access to such a large amount of data, Waldinger’s results surprisingly yield only a handful of factors that transcend people of different generations.  This TED talk attempts to reveal what makes people happy and healthy.

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Feature: SAM Nasim at flickr