This paper examined the associations among: (1) the perceived freedom to initiate and end interpersonal relationships ( relational mobility), (2) relationship quality, and (3) well-being. Across 38 nations, people in nations with higher relational mobility reported greater well-being, which was explained by higher-quality relationships with close others (Study 1A). This effect was replicated at the individual level, after controlling for extraversion and socio-economic status (Study 1B). Finally, first-year college students with higher relational mobility reported receiving more social support from new friends during the COVID-19 pandemic, which explained those students’ higher well-being during the pandemic (Study 2). Together, this work demonstrates that relational mobility can explain enhanced well-being across nations, individuals, and life circumstances, and indicates potential avenues for interventions that increase the well-being of individuals and societies.

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