In coming to terms with the dynamic of “capitalist nature,” I put forth an argument regarding the indispensability of Marxian “social form critique” for radical geography, critical environmental studies, and beyond. Contrary to popularised “worldview Marxism” (and criticisms of it) that views the concept of “value” as a transhistorical and normative category that venerates “labour,” value in Marx should be understood as one dimension of the twofold character of the commodity form, whose hegemonic generalisation is class-based and pertains only to capitalism. As the measure of wealth peculiar to this “mode of life,” value’s “purely social” and temporal character establishes a context of alienation that is not merely economic but also discloses the forms of being (Daseinsformen) characteristic of this society. In this way, Marx offers what Moishe Postone calls a “critical ethnography” of capitalist society, one that illuminates the contradictory social forms that undergird the threefold character of “capitalist nature”: the “nature” of its laws of motion; the array of “natures” that it produces; and the new subjectivities (or “human natures”) that emerge from it. A central aim of the article is to ground historically the current parameters of “the political” as a way of uniting Marxian social form analysis with various critical (but non-Marxist) perspectives whose combined insights would call for the abolition, not veneration or reform, of capitalism’s value structure.