Seven Types of Obloquy: Traversties of Marxism by Norman Geras:
I see this as a terrific example of where reasoned and well formed criticism can stand on its own, in spite of the divergent trajectory which the author appears to take later on in his life through his reactionary offshoots.
As with any analytical field of inquiry which aspires to achieving insights, syntheses and increased understandings of the world, Marxism contains a broad array of unique and differeing perspectives, some of which fall far short of the high standard of rigor demanded of a scientific field. Here, Geras addresses several lazy and incongruent arguments put forward by Marxists who are themselves claiming to remedy pitfalls in Marx’s views; a public purging of sorts, these types of obloquy.