You may find inspiration from the participants in the Harvard Study of Adult Development — one of the longest-running studies on happiness.
For nearly 80 years, the Harvard Study of Adult Development has been producing data and lessons on how to live longer, happier, and.
The Grant Study is part of the Study of Adult Development at Harvard Medical School. It is a The study, its methodology and results are described in three books by a principal investigator in the study, George Vaillant. The first book describes.