WHAT truly makes for a fulfilling and meaningful life?
According to one of the longest-running scientific studies in history, the answer is simple – our relationships.
Dr Robert Waldinger and Dr Marc Schulz, authors of The Good Life: Lessons from the World’s Longest Scientific Study of Happiness, share insights drawn from the Harvard Study of Adult Development, a project that has tracked the lives of hundreds of people over more than 80 years.
Their key finding: strong, positive relationships are the most powerful predictor of health and happiness as we age.
Dr Waldinger, a psychiatrist and professor at Harvard Medical School, leads the study alongside Dr Schulz, a psychology professor at Bryn Mawr College. Together, they have sifted through decades of data – from medical records to personal interviews – to understand what contributes most to a satisfying life.
“The clearest message we get from this 80-year study is this: good relationships keep us happier and healthier. Period,” Dr Waldinger said.
Far beyond wealth, fame or even physical fitness, it’s our social bonds – whether with partners, family, friends, or community – that influence not only our emotional well-being but also our brain and body health as we age.
The study began in 1939 and originally followed two very different groups of men – Harvard undergraduates and boys from disadvantaged Boston neighbourhoods.
Over time, it expanded to include the participants’ wives, children and grandchildren. This wide-ranging perspective has allowed researchers to track how experiences in early life shape relationships and well-being across generations.
Perhaps most importantly for older adults, Dr Waldinger emphasises that it’s never too late to improve your quality of life by nurturing your connections.
“At any age, we can make small choices that strengthen our relationships,” he notes. For seniors, who may face increased isolation, the study’s findings are both reassuring and empowering. Building and maintaining meaningful relationships can be a vital part of healthy aging – and the key to a life well lived.

