following article provides a review of arguments listed in Karl Popper's book titled The misery of historicism in which he levels criticism against the historicist concept derived from the philosophical views of authors such as Plato, Hegel, and Marx. In his criticism he resorts to arguments that are epistemological in nature to show that the deductive-nomological model of scientific explanation is not applicable to the discipline of history. In this respect, he refutes one the strongest theses for which he advocated his entire life, namely, that of methodological monism or methodological unification of science; inherited from logical positivism.