George Vaillant, MD, who headed the study for more than 30 years, published the study's findings in his book Triumphs of Experience, The Men of the Harvard Grant Study
If you don't wish to read the book, you can read more about the study at this Huff Post. The results can all be summed up very simply: Happiness is love.
After 75 years and 20 million dollars, the study found that love was the answer for men. I think it's safe to say that love is also the answer for women. We're all on this planet looking for love, trying to connect in an elemental way with one special person.
No wonder Romance Novels are so popular. Yes, men read them too, but they may not admit it.
Viva la romance!