1 A Versatile Mediator 2 Theory and Method in the Social Sciences 3 Kaufmann and Logical Empiricism 4 Kaufmann and the Liberal Wing of Viennese Late Enlightenment 5 Kaufmann and Popper 6 Kaufmann in the United States 7 Rediscovering Kaufmann's Methodology.

This paper concerns the issue of whether the so-called left wing of the Vienna Circle (Carnap, Neurath, Frank) can be understood as having provided the blueprint for a bipartite metatheory with a formal-logical part (the “logic of science”) supporting and being supported by a naturalistic-empirical part (the “behavioristics of science”). A claim to this effect was recently met by a counterclaim that there was indeed an attempt made to broaden Carnap’s formalist conception of philosophy by the pragmatist Morris, but that (...) this initiative failed and that Carnap showed no interest in it. To defend the original claim this paper provides an analysis of Carnap and Morris on the subject matter of pragmatics in order to show that and how Carnap adopted Morris’s proposals in so far as they agreed with bipartite metatheory conception. (shrink)