Margaret Mahler stressed that while the separation-individuation phase comes to an end during the third year of life, the separation-individuation process continues throughout life. Indeed, she viewed the rapprochement subphase of separation-individuation as "the mainspring of man"s eternal struggle against both fusion and isolation." Exponents of her work have found that each developmental step during life stirs up potential threats of object loss, separation anxiety, and the necessity for negotiating one"s relationships with internalized objects of childhood. Eleven distinguished psychoanalysts carry these ideas further in this well-organized volume. Together, they trace the echoes of the separation-individuation process through the Oedipus complex, latency, and adolescence, well into mature adulthood, even senescence. Combining psychoanalytically informed infant and child observation data with the established tenets of ego psychology and object relations theory, these investigators...