But what Harlow demonstrated so vividly with infant monkeys, and what study after study has shown to be all the more true in human beings, is that connection is not just “what causes happiness.” It is also our most basic need. The reality of our innate need for connection is often most clearly revealed in the experience of dis-connection. Dropped cell phone calls, the loss of a job or career opportunity, a romantic breakup, the death of a loved one—each kind of disconnection alerts us to the fact