Maccoby (this volume) offers a number of important new insights for those of us interested in the study of children and their families. So many, in fact, that I have limited my comments to a specific discussion of Maccoby’s premise regarding the importance of considering gender in our investigations of reciprocal family influences. This is an extremely powerful and often neglected perspective. My goal is to take this idea and further illustrate its significance through discussion of research on the family relationships of aggressive children. This seems like an interesting and appropriate area for exploration, particularly given the recent focus in the childhood aggression literature on gender-balanced assessments of aggressive behavior and contributing factors.