" Maximum awareness and respect for the scholarship of historians outside the boundaries of Marxism is not incompatible with rigorous pursuit of a Marxist historical enquiry: it is a condition of it. Conversely, Marx and Engels themselves can never be taken simply at their word: the errors of their writings on the past should not be evaded or ignored, but identified and criticized. To do so is not to depart from historical materialism, but to rejoin it. "

― Perry Anderson , Passages from Antiquity to Feudalism