Amazon.com\\\"We all need models for how to live from retirement to past 80--with joy,\\\" writes George Vaillant, M.D., director of the Harvard Study of Adult Development. This groundbreaking book pulls together data from three separate longevity studies that, beginning in their teens, followed 824 individuals for more than 50 years....

At a time when many people around the world are living into their tenth decade, the longest longitudinal study of human development ever undertaken offers some welcome news for the new old age: our lives continue to evolve in our later years, and often become more fulfilling than before....

Between 1939 and 1942, one of America\'s leading universities recruited 268 of its healthiest and most promising undergraduates to participate in a revolutionary new study of the human life cycle....