A decades-long Harvard study has concluded that good relationships and close friendships are the key to lifelong health and happiness. In this NewsHour program, Ali Rogin speaks with Dr. Robert Waldinger, a clinical professor of psychiatry at Harvard Medical School and the study's director, to learn more about his team's research and how people can nurture the relationships in their lives.

Originally released by NewsHour Productions LLC, 2023. Streaming video file encoded with permission for digital streaming by Infobase on March 11, 2024.