Notes for Inquiring Readers
INTRODUCTION: THE MASTER COMPETENCY
Stages of Personal Development
The idea of age-related stages of adult development comes from a companion field called lifespan developmental psychology, which focuses on the age-specific "psychosocial tasks" that need to be resolved over the course of a person's lifespan. During the 1970s, Daniel Levinson and his colleagues published The Seasons of a Man's Life, which described age-related issues faced by a sample of American males aged eighteen to forty-seven and what it took to resolve these issues successfully. In Passages, Gail Sheehy used a similar per-spective to outline age-related stages of life (which we call "life phases") as experienced ...
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