For close to 80 years, Harvard University researchers have studied the lives of the same group of men. The big takeaway from the decades of research and millions of dollars spent on the famous Grant Study is that, as the Beatles sang, all you need is love. Those who were happiest and healthier reported strong interpersonal relationships, while those who were isolated had declines in mental and physical health as they aged. We say in every single paper, more research is needed to test these findings out in other populations,” Waldinger said. “No sample is perfect, some would probably never fund our study, but we are doing something still valuable.

Source: Washington Post April 17, 2017 11:06 UTC