One of the most comprehensive assessments of factors affecting well-being is the World Values Survey. Initiated in 1981, the survey asks nationally representative sample populations in nearly 100 countries about their beliefs and values.
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The top five factors, ranked in order of impact, were romantic and familial relationships, financial situation, work, community and friends, and health. Romance, family, friends, and community are tightly bound up with concepts of relationship, as is work. There is no doubt that relationships constitute the backbone of lives well lived.