Theory and History: An Interpretation of Social and Economic Evolution by Austrian economist and philosopher Ludwig von Mises tackled his all-important idea of methodological dualism. A combination of hard sciences and social sciences, Mises defends the epistemological status of economic propositions, develops the concept of thymology, and presents his critique of Marxist materialism. Furthermore, Mises put forward a theory of knowledge and value, and explored and analyzed paradigms of thought such as determinism, materialism, dialectic materialism, historicism, scientism, positivism, behaviorism and psychology. Other professionals and economists considered Theory and History to be Mises’s most overlooked work.