Friendships:

Rob Henderson:

"In their book “The Social Brain: The Psychology of Successful Groups,” the Oxford psychologist Robin Dunbar and his coauthors report that the number and quality of your friendships have a larger effect on your health than your weight, how much exercise you do, what you eat, and the quality of air you breathe. They go on to write, “By far the biggest medical surprise of the past decade has been the extraordinary number of studies showing that the single best predictor of health and wellbeing is simply the number and quality of close friendships you have.” "