We challenge the intellectual separation of interpersonal and mass media communication, arguing that this division of communication research rests primarily on grounds of historical convenience and university politics. There is little theoretical justification for the dichotomous division of our field, yet we provide evidence that communication scholars seldom cross-cite research articles between the two subdisciplines, rarely attend scientific conferences in ways that span this distinction, and often are segregated in separate university departments. The intellectual costs of this division are discussed, and possible means of furthering intellectual exchange between the two subdisciplines are discussed.