"Men make their own history, but they do not make it just as they please; they do not make it under circumstances chosen by themselves, but under circumstances directly encountered, given and transmitted from the past. The tradition of all the dead generations weighs like a nightmare on the brain of the living". “Karl Marx: The Eighteenth Brumaire of Louis Bonaparte,” LIBERTY, EQUALITY, FRATERNITY: EXPLORING THE FRENCH REVOUTION,
That is why the lack of theoretical foundation harms many segments of the left, which confuse Marxism with an idealized view of Christianity