Original sentence: Although Hegel never used such a classification himself, Hegel's dialectic is often described as consisting of three stages: a thesis, an antithesis which contradicts or negates the thesis, and a synthesis embodying what is essential to each.Karl Marx and Friedrich Engels saw Hegel as "standing on his head", and put him back on his feet, ridding Hegel's logic of its idealist orientation, and conceiving what is now known as materialist or Marxist dialectics.Under Stalinism, Marxist dialectics degenerated into what was called "diamat" (short for dialectical materialism), an arid, scholastic, opportunist travesty of the system of thought exemplified by the works of Marx, Engels, Lenin, and Trotsky
Edited sentence: Although Hegel never used such a classification himself, Hegel's dialectic is often described as consisting of three stages: a thesis, an antithesis which contradicts or negates the thesis, and synthesis embodying what is essential to each.Karl Marx and Friedrich Engels seeing that Hegel was, as they said, "standing on his head", put him back on his feet, ridding Hegel's logic of its idealist orientation, and conceiving what is now known as materialist or marxist dialectics.Under Stalinism, marxist dialectics degenerated into what was called "diamat" (short for dialectical materialism), an arid, scholastic, opportunist travesty of the system of thought exemplified by the works of Marx, Engels, Lenin, and Trotsky