This expanded edition of a 1982 book by Erik Erikson summarizes his work on the stages of the human life cycle, including chapters on psychosexuality and the cycle of generations, major stages in psychosocial development, and ego and ethos. An additional chapter on the ninth stage sets forth his philosophy on old age--i.e. the 80s and 90s--and how persons in this age group integrate earlier stages and face the end of life. Two additional chapters and a preface by his wife, Joan Erikson, provide additional insights into the aging process and the final stages of life and include anecdotes about the couple's life together and their research. Contains 54 references. (KC)