In “The Heart Grows Smarter,” David Brooks describes the Grant Study — a longitudinal study begun in 1938 at Harvard that followed participants for decades. George Vaillant’s recent Trimphs of Experience tells the story of this impressive scholarly achievement. Lifespan development research in action!
Vaillant, George (2012) Triumphs of Experience: The Men of the Harvard Grant Study. Belknap Press of Harvard.