The study's happiest participants had two major factors in common throughout its 85 years: taking care of their health and building loving relationships with others. Professional success on its own does not guarantee happiness, even though it may be gratifying. The study revealed that those who were happiest were not isolated. In fact, the happiest people valued and fostered relationships. Levels of education and cultural awareness, which tend to be higher among those with higher salaries, were also important factors for adopting healthy habits (promoted more often as of the 1960s) and for better access to healthcare.
