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If you have another (or more) in mind it would have been more enlightening to the rest of us if you had named them.
And yet your first comment is asserting that Marxist historiography is the definition of the study of history:
> The study of history is the study of struggle between classes.
Marxism for the american academy refers to the liberal strand of it (e.g. the kind that John Bellamy Foster advocates for) rather than the authoritarian flavors.
The left-wing bias in parts of the academy is real.