Robert J Waldinger.
In 1939 the Harvard Study on Adult Development begin following the lives of hundreds of people. Rich and Poor. Educated or not. It has continuously done so for decades. The study now includes the children of the original participants
If there is one thing that the study has discovered that leads to happy and thriving lives, it's the necessity of quality relationships. The happiest participants had close, quality relationships and were in stable & supportive marriages.
