In this TED Talk, the results of a 70+ year study of teenagers from the 1940s to now reveal what the keys to happiness are.  Turns out there’s only one key. The most reliable predictor of health, happiness, longevity, consistent cognitive function is the presence of healthy, happy, quality relationships.

http://www.ted.com/talks/robert_waldinger_what_makes_a_good_life_lessons_from_the_longest_study_on_happiness/transcript?language=en

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