In a unique series of studies, Harvard University has followed 824 subjects from their teens to old age. Professor George Vaillant now uses these to illustrate

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In the past century, average life expectancies have nearly doubled, and today, for the first time in human history, many people have a realistic chance of livin

INSTANT TOP 10 BESTSELLER • New York Times • USA Today • Washington Post • LA Times “Debunks the idea that aging inevitably brings infirmity and unhap