Early in his service as the United States Surgeon General, Vivek Murthy, M.D., did a cross-country listening tour for a firsthand evaluation of health in America. It was an enlightening and sobering experience. Dr. Murthy spoke with countless numbers of Americans who felt isolated, invisible, and insignificant. In a word, they felt lonely. Following his listening tour, Dr. Murthy reviewed research that confirmed the magnitude of this problem.