Harvard Study of Adult Development

The Harvard Study of Adult Development is one of the longest-running research projects, tracking the lives of hundreds of men over nearly 80 years. Its goal is to understand what factors contribute to a happy, healthy, and meaningful life. The study has found that strong relationships, good mental health, and positive social connections are key to well-being. Physical health, financial stability, and purpose also matter, but relationships consistently stand out as the most important factor for long-term happiness and fulfillment.