Seventy-five years and $20 million in research funds, to arrive at a three-word conclusion: “Happiness is love.” Love is a function of intimacy and the depth and number of interactions we have with people. At its best, Facebook both taps into our need for these relationships, and helps nourish them. We’ve all felt it. There’s something satisfying in rediscovering someone you knew twenty years ago, and keeping in touch with friends after they move away. When friends post pics of their new baby, we get a delicious hit: dopamine.11
