In 1938 Harvard University began following 268 male undergraduate students and kicked off the longest-running longitudinal studies of human development in history.  The study’s goal was to determine as best as possible what factors contribute most strongly to human flourishing.  The astonishing range of psychological, anthropological, and physical traits — ranging from personality type to IQ to drinking habits to family relationships to “hanging length of his scrotum” — indicates just how exhaustive and quantifiable the research data has become.  Recently, George Vaillant, who directed the study for more than three decades, published the study’s findings in the 2012 book Triumphs of Experience (Amazon)and the following is the book’s synopsis:

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