This article describes the historical abandonment of the distinctive conception of the social dimensions of cognition, emotion and behavior embraced by American social psychologists in the early decades of the twentieth century. It is suggested that part of the reason why the original conception of the social was abandoned by American psychologists was because of its association with theories of the "group mind," the apparent threat it posed to cherished principles of rationality and autonomy, and the impoverished conception of the social inherited from European crowd theorists that came to inform the experimental study of social groups. It is suggested that while these factors partly explain the neglect of the social in American social psychology, none represent particularly good reasons for abandoning the original conception of the social. Consequently there are in principle no impediments to the revival of the theoretical and experimental study of the social dimensions of cognition, emotion and behavior in contemporary American social psychology.In this paper I address and suggest tentative answers to a puzzling historical question: why was the original conception of social psychological phenomena embraced by early American social psychologists progressively neglected and eventually abandoned as the twentieth century developed? In this short paper I don't expect to be able to persuade many of the virtues of the original conception, or of my historical explanation of its neglect. However, I do hope to encourage some to reflect critically on the peculiar history of social psychology, and to reconsider the justification for contemporary conceptions of the social psychological.
THE LOST WORLDIn the early decades of the twentieth century, American social psychologists (in both departments of psychology and sociology) held a distinctive conception of the social dimensions of cognition, emotion and behavior. Social cognition, emotion and behavior were conceived as forms of cognition, emotion and behavior engaged because and on condition that other members of social groups are represented as engaging these (or other) forms of cognition, emotion and behavior in similar circumstances ( Bogardus). Social cognition, emotion and behavior were conceived as psychological states and behavior engaged socially : that is, by reference to the represented psychology and behavior of members of social groups. In contrast, individual cognition, emotion and behavior were conceived as cognition, emotion and behavior engaged individually : that is, for reasons or causes independent of the represented psychology and behavior of members of social groups.These distinctions may be illustrated by reference to a concrete example drawn from early American social psychology. Roger Schanck (1932) studied the preferences for forms of baptism among Methodists and Baptists. Among the Methodists,