Just to preface this, I'm not arguing against the critique of the reactionary position in this meme, but speaking more generally and trying to round out understanding of the whole philosophical argument. We clearly know that the idealist free will position is inaccurate, but the mechanical determinist position doesn't give us the full picture either.
While our lives are shaped by our material conditions, we should always keep dialectical materialism in mind and not fall into a purely mechanical determinism that becomes a pessimistic or nihilistic fatalism.
We can observe how the determinist, fatalist mechanist element has been an immediate ideological “aroma” of Marxism, a form of religion and of stimulation (but like a drug necessitated and historically justified by the “subordinate” character of certain social strata).
When one does not have the initiative in the struggle and the struggle itself is ultimately identified with a series of defeats, mechanical determinism becomes a formidable power of moral resistance, of patient and obstinate perseverance. “I am defeated for the moment but the nature of things is on my side over a long period,” etc. Real will is disguised as an act of faith, a sure rationality of history, a primitive and empirical form of impassioned finalism which appears as a substitute for the predestination, providence, etc., of the confessional religions. We must insist on the fact that even in such a case there exists in reality a strong active will, a direct influence on the “nature of things,” but it is certainly in an implicit and veiled form, ashamed of itself, and so the consciousness of it is contradictory, lacks critical unity, etc. But when the “subordinate” becomes the leader and is responsible for the economic activity of the mass, mechanicalism appears at a certain moment as an imminent danger, there occurs a revision of the whole mode of thinking because there has taken place a change in the social mode of being.
We should always keep in mind that, despite the limitations imposed on us by material conditions and history, we are parts of the whole and not just passive entities being directed by outside forces. Our actions and choices, especially collective ones, do matter and are what shapes our societies.
As Marx puts it:
Men make their own history, but they do not make it as they please; they do not make it under self-selected circumstances, but under circumstances existing already, given and transmitted from the past.