After more than eighty years of research at Harvard, the longest-running study on happiness reveals the true source of well-being
Since 1938, the University of Harvard conducts one of the most extensive studies ever conducted on human development. The adult development study began by following 268 college students and, over time, expanded to include more than 2,000 participants and their descendants. The central question has always been the same: what really brings happiness and longevity?
The power of relationships
After over 80 years of observation, the results are clear: emotional bonds are the main determinant of happiness and lasting health. People in loving relationships – whether familial, romantic or friendly – live longer, tolerate stress better and are at a lower risk of physical and mental illness.
On the other hand, loneliness has been found to be as harmful as smoking and excessive alcohol consumption. According to the psychiatrist Roberto Waldingercurrent director of the studio, “loneliness kills”. The researchers also found that those who said they were most satisfied with their relationships at age 50 were also the healthiest at age 80. Strong relationships, based on trust and affection, function as a kind of protective shield against emotional exhaustion and premature aging.
The impact of loneliness
Living in isolation doesn’t just affect your mood. It also increases the risk of cardiovascular disease, accelerates cognitive decline and weakens the immune system. The study describes loneliness as “toxic” because it undermines vitality and purpose in life. People with few social ties tend to experience more physical pain, insomnia, and high levels of stress.
Seven habits that promote happiness, according to Harvard
One of the research arms, known as Study grantidentified habits that are repeated among the happiest and healthiest people. I am:
- Avoid excessive alcohol consumption;
- Maintain a balanced weight;
- Practice regular physical exercise;
- Learn to deal with conflicts and reduce stress;
- Fuel curiosity and continue learning;
- Preserve stable friendships and romantic bonds;
- Actively participate in community or social groups.
These habits complement each other and have one thing in common: everyone goes through relationships with themselves and others. Over the decades, the study has debunked a common belief: success and wealth do not guarantee lasting well-being. What really makes the difference is having someone to share your life with: someone who listens, supports and celebrates the small and big moments.
Source: Terra

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