To assess Erikson's life cycle model, 86 men, initially selected for health, were prospectively studied at age 21, and reassessed 32 years later at age 53. Using the Vaillant and Milofsky (1980) modification of Erikson's model, 48 men (56%) achieved generativity, an advanced developmental stage, at follow-up. Results generally support Erikson's model and show that generativity was significantly associated with successful marriage, work achievements, close friendships, altruistic behaviors, and overall mental health. Successful young adult predictors of Erikson's model at midlife included a warm family environment, an absence of troubled parental discipline, a mentor relationship, and, most importantly, favorable peer group relationships. Significant predictors of Erikson's model were of moderate effect size and involve young adult social relationships rather than physical symptoms or parental social class standing.