Purpose-a cognitive process that defines life goals and provides personal meaning-may help explain disparate empirical social science findings. Devoting effort and making progress toward life goals provides a significant, renewable source of engagement and meaning. Purpose offers a testable, causal system that synthesizes outcomes including life expectancy, satisfaction, and mental and physical health. These outcomes may be explained best by considering the motivation of the individual-a motivation that comes from having a purpose. We provide a detailed definition with specific hypotheses derived from a synthesis of relevant findings from social, behavioral, biological, and cognitive literatures. To illustrate the uniqueness of the purpose model, we compared purpose with competing contemporary models that offer similar predictions. Addressing the structural features unique to purpose opens opportunities to build upon existing causal models of "how and why" health and well-being develop and change over time.What do volunteer services, social support, pet care, and religious attendance have in common? Recent studies indicate that people participating in these activities live longer than those who do not. Volunteers had a 60% lower mortality rate compared with nonvolunteers (Oman, Thoresen, & McMahon, 1999). Providers of social support had a 50% lower mortality rate than those who neither received nor provided social support (S. Brown, Nesse, Vinokur, & Smith, 2003). Hypertensive people who owned pets had lower blood pressure and lived longer, as compared with non-pet owners (Allen, Shykoff, & Izzo, 2001). Finally, frequent religious service attendees had longer lifespans compared with nonattendees or infrequent attendees (Strawbridge, Cohen, Shema, & Kaplan, 1997). What these findings have in common appears to be longevity; however, purpose may link these behaviors. We hypothesize that purpose leads to longer life span, fewer health care problems, and greater life satisfaction. Purpose, from our perspective, is not something merely to attain, but rather is an important predictive variable of physical health and mental health. Furthermore, our conceptualization of purpose does not rule out other routes to healthy living. However, when present, purpose is central to a person's life narrative. Neglecting its presence can lead to erroneous conclusions about "how" and "why" people behave as they do.
What Is Purpose?Purpose is a central, self-organizing life aim that organizes and stimulates goals, manages behaviors, and provides a sense of meaning. Purpose directs life goals and daily decisions by guiding the use of finite personal resources. Instead of governing behavior, purpose offers direction just as a compass offers direction to a navigator; following that compass (i.e., purpose) is optional. Living in accord with one's purpose, however, offers that person a self-sustaining source of meaning through goal pursuit and goal attainment. Furthermore, purpose is woven into a person's identity and behavior as a central,...