 Physicalism encompasses psychology, history, economics and sociology without reducing them to physics. Social sciences are scientific within the framework of physicalism, namely, insofar as they describe concrete spatially and temporally ordered events and processes and make predictions about them (Neurath 1931b/1973, 325). Social behavior is itself a complex and its prediction requires that sociology incorporate various sources such as history, ethics, jurisprudence, economics, ethnography, etc. (ibid., 328). For Neurath, Marx’s study of capital is important first and foremost as an instance of empirical research that brings together history and economics, and the most complete case of physicalist sociology (ibid., 349). Sociology is a synthetic effort part of in turn a larger synthetic effort that is unified science, the set of all connectible languages and laws required to describe and predict order. The synthetic dimension is inseparable from the empirical one: It is the formal, linguistic and conceptual, expression of the totalistic, holist approach required by the conception of empirical reality as a complex, including the phenomena of ‘concrete ways of life’. Empirically determinable behaviors are partial descriptions, separations, for instance ‘peoples’ are ‘loosely separable sections of the mass of men’ (ibid., 332). In general, concreteness and complexity are characteristics of reality that language expresses, especially unanalyzed and imprecise cluster (Ballung)-type terms.