New Evidence for the Necessity of Loneliness
John Cacioppo proposes that the root of social ties lies in their opposite — loneliness. According to his theory, the pain of being alone motivates us to seek the safety of companionship, which in turn benefits the species by encouraging group cooperation and protection. Loneliness persists because it provides an essential evolutionary benefit for social animals. Like thirst, hunger, or pain, loneliness is an aversive state that animals seek to resolve, improving their long-term survival. If Cacioppo’s theory is correct, then there must be an intrinsic biological mechanism that compels isolated animals to seek out companionship. Something in our brains must make it feel bad to be alone and bring relief when we’re with others. Researchers at the Massachusetts Institute of Technology think they’ve found the source of that motivation in a group of little-studied neurons in part of the brain called the dorsal raphe nucleus.