In colorful prose, Nacht resumes his interest in aggression and masochism. The middle section of this three-part paper is entitled Clinical Survey and is by far the best—full of relevant facts taken from the author's cases, with vivid data about the pertinent background so that the clinical picture is clear in each instance. The first section deals with various theoretical views on the subject of aggression, which Nacht simplifies in order to emphasize the importance of his own. The fault in this emphasis becomes apparent when he expands his own theoretical views into clinical concepts: structural and dynamic formulations become mingled, the importance of narcissism is overlooked, and the specificity of cause and effect becomes blurred—at least in contrast to the clarity of the clinical material. The final section, entitled Therapeutic and Preventive Aspects, is again excellent in its presentation of clinical data, but is weakened by truisms about the training of mothers for motherhood. The translator clearly shares Nacht's enthusiasm which makes for exceedingly pleasant reading.