Freud, Spock and Piaget have charted almost every inch of childhood. Psychoanalyst Erik Erikson put the final touches on a convincing map of adolescence. Yet until very recently, most of the charting stopped near the age of 21 —as if adults escape any sequence of further development. Now a growing number of researchers are surveying the adult life cycle.
The research so far has been narrow, concentrating largely on white, middleclass American males. But in "separate studies, three of the most important life-cycle scholars—Psychiatrist Roger Gould of U.C.L.A., Yale Psychologist Daniel Levinson and...
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