... We highlight evidence from the Midlife in the United States (MIDUS) Survey, the Health and Retirement Study (HRS), and the English Longitudinal Study of Ageing (ELSA) to underscore these points. A proliferation of recent findings have documented the protective influence of eudaimonic aspects of well-being, particularly purpose in life, in reducing risk for major depression (Keyes, 2002;Rottenberg, Devendorf, Panaite, Disabato, & Kashdan, 2019), multiple disease outcomes (Boyle, Buchman, & Bennett, 2010;Kim, Sun, Park, Kubzansky, & Peterson, 2013;, and extending length of life (Hill & Turiano, 2014;Steptoe, Deaton, & Stone, 2015). Intervening biological and brain-based mechanisms have also been explicated (Hafez et al., 2018;Heller et al., 2013;Morozink, Friedman, Coe, & Ryff, 2010;Schaefer et al., 2013;Zilioli, Slatcher, Ong, & Gruenewald, 2015). ...