The Seasons of a Man's Life: The Groundbreaking 10-Year Study That Was the Basis for Passages!;

The first full report from the team that discovered the patterns of adult development, this breakthrough study ranks in significance with the original works of Kinsey and Erikson, exploring and explaining the specific periods of personal development through which all human begins must pass--and which together form a common pattern underlying all human lives.
"A pioneering and radical theory of adult development."
CHICAGO TRIBUNE