Discusses three alternative life styles to monogamous marriage: swinging, open marriage, and group marriage. Includes brief reviews of both the critique of monogamous marriage as not fulfilling intimacy needs, and research on individuals in alternative life styles as displaying potentially normal behavior. (Author)

Reviews research on changes in personality, social involvement, and roles which occur in the latter half of life, with a particular focus upon the differing and often divergent directions that men and women take. Considers the significance of these changes both to the individual and to marital harmony. (Author)