As Marxism has developed over time into various branches and schools of thought, there is currently no single definitive Marxist theory.Some Marxist schools of thought place greater emphasis on certain aspects of classical Marxism while rejecting or modifying other aspects.
Some schools have sought to combine Marxian concepts and non-Marxian concepts which has then led to contradictory conclusions. It has been argued that there is a movement toward the recognition of historical and dialectical materialism as the fundamental conceptions of all Marxist schools of thought.
