In general, the people who mastered adulthood's life tasks — Identity, Intimacy, Career Consolidation, Generativity, Keeper of the Meaning and Integrity — lived longer, were more fulfilled, had more friends, and were happier.
One could also take a more optimistic view that people don't tend to join organizations and societies until they get older — similar to what Erikson described as the generativity phase of human development.