Existing accounts of American sociology’s founding years during the early twentieth century assume that the discipline was ‘metrocentric.’ They assume that it was only interested in processes occurring within the United States; that American sociologists fell prey to state-centrist thought; and that, therefore, contextualizing America sociology’s emergence necessitates understanding relations, events, and processes within the confines of US territorial boundaries. By contrast, this paper shows the imperial and hence global aspects of early American sociological thought. Early American sociologists were interested in imperialism and, therefore, in cross-societal, transnational, and global processes and relations. Implicitly or explicitly they approached imperialism as a process by which social groups, not least ‘races,’ interacted and conflicted. They also saw it as a route towards new global forms. Early American sociology thus articulated a sociological imagination that looked beyond American society and to the wider world.