Abstract
What I want to focus on in this paper is the question of the connection between the positivism of the Vienna Circle — the "scientific conception of the world" — and politics. The Vienna Circle will be considered first ''als soziale Bewegung'' and second from the point of view of "Sozialforschung". The paper is a case study in the problem of the relation of a theory to practice, and more particularly, of the relation of a technical epistemological and methodological theory of science to social practice. The critical assessment of the nature of the Vienna Circle as a social movement starts from the consideration of the views of Otto Neurath; and concludes with some theses about the failure of this social movement precisely as it relates to the logical positivist and logical empiricist theory of science, and to its scientific conception of the world.