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In page Marx in the Mid-Twentieth Century:

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Petrović discusses the relevance of Karl Marx's thought to contemporary philosophy. He discusses "the relationship between philosophy and Marxism, the essence and development of Marx's thought and the difference between creative and dogmatic Marxism", as well as subjects such as praxis, freedom, socialism, and humanism, and issues of ontology and epistemology, such as being, truth, knowledge, logic, and mathematics.[1]