"The defining mark of irreligion is 'sociologism'"

"To [agree with but then] invert Hegel [as Marx did] is to say that philosophy resolves itself not in understanding, but in action—in praxis. But in this case, God, being, nature, truth—all forms of transcendence—simply cease to matter. It is not that their non-existence has been demonstrated by argument; indeed, atheism rests on a negative act of faith, which Del Noce will later exploit for his alternative philosophical history. It is that reason itself has been so transformed by the conflation of thought and praxis that transcendence has become, strictly speaking, unthinkable. God is not a question that can be posed seriously from within this conception of 'reason.' What matters now is history: the past historical and material conditions that make all truth claims into an expression of ideology, and the future historical conditions that will be changed by human praxis, that is, by science and political action, whose 'truth' is verified by its effectiveness.
     "The decisive element of Marx’s atheism is inseparable, in other words, from his rejection of the 'philosophy of comprehension.' And Marxist atheism surpasses all previous forms because it passes into irreligion, which defeats religion not by argument but simply by erasing God and the religious dimension from thought and life. This is the decisive reason that man after Marx is destined to become fully bourgeois—in Del Noce’s later formulation, 'a man whose life is completely determined by the category of usefulness, so that he desecrates everything he thinks about.' The defining mark of irreligion is 'sociologism,' which reduces all pretense of metaphysical truth to historical conditions and social or psychological functions within the immanent field of power relations that define modern politics, carrying a world of metaphysical assumptions in train. Sociologism makes anonymous atheists of us all, and one can measure the scope of its triumph within Christianity itself by the extent to which the social sciences have replaced metaphysics in the Church’s manner of thinking."

     Michael Hanby, "Del Noce's moment," First things no. 327 (November 2022):  60 (59-63).