When I began my psychiatric residency training in Boston in the late 1950s, sociologists and other social scientists were active members of many major academic departments of psychiatry. Collaboration between psychiatrists and sociologists and anthropologists was widespread and had considerable influence on theory and clinical practice. NIMH had established its Laboratory of Socio-Environmental Studies under the leadership of John Clausen. Sociologists and anthropologists were active in policy-making and research activities at NIMH and at many foundations. The influential works of Stanton and Schwartz (1954), Hollingshead and Redlich (1958), and Greenblatt, Levinson, and Williams (1957) reflect this period of collaboration. Over the subsequent three decades, the relationship between sociology and psychiatry changed considerably. Now relatively few academic departments of psychiatry have social scientists on their full-time faculty. Interaction between psychiatrists and social scientists, in many instances, has become adversarial. This adversarial quality, I believe, is reflected in the paper by Mirowsky and Ross. Their paper illustrates a genre of social science criticism of psychiatry which challenges the scientific validity of the concept of mental illness and raises important issues in measurement. Mirowsky and Ross, however, go beyond the scientific issues; they offer a social criticism of recent changes in psychiatry which they perceive to be the "legacy of nineteenth-century epidemiology and microbiology." Mirowsky and Ross are correct in their perception that significant shifts have occurred within psychiatry over the past decade. Yet their historical reconstruction of those changes and their understanding of the scientific basis for current research and clinical practice are seriously limited; they reflect their ideological commitment more than an appreciation of the increased sophistication of recent theoretical discourse and empirical research in psychiatry. In my commentary I will attempt to correct this imbalance by reconstructing the recent history and by explicating the rationale behind the current approach to psychiatric diagnostic categories. [ABSTRACT FROM AUTHOR]