Mechanical Materialism

Mechanical materialism names the Enlightenment-era philosophical program—sometimes labeled "mechanicism"—that attempts to account for all phenomena, both bodily and mental/spiritual, by appeal to a single, uniform mechanical causality. As a historical-philosophical concept, it represents the first systematic articulation of materialism as an explicit position, emerging in the early eighteenth century (Dolar traces the very coinage of "materialism" to Walch, 1726). Its core claim is the sufficiency of mechanical explanation: no phenomenon—however apparently immaterial, intentional, or "spiritual"—requires a supplement beyond the operations of physical causality. It is this radicalism, refusing to flinch at the application of mechanical law to thought itself, that gives the stance its polemical force.

Yet, in the argument of the source text, this is precisely mechanical materialism's fatal limitation. Because it simply inverts idealism's hierarchy—placing matter where idealism placed spirit, but preserving the same logical and ontological framework—it cannot escape the structure it opposes. It mirrors idealism rather than displacing it. The term arrives, from its very coinage, not as a neutral description but as a "battle cry" in an irresolvable antagonism. Any materialism that grounds itself in mechanical causality already concedes the terrain to idealism; it has only switched the valence of the poles without touching the framework. This is why, for Dolar, a genuine materialism cannot bypass Hegel: only a dialectical account of contradiction, substance, and the subject can break the symmetry that makes mechanical materialism idealism's unwitting mirror image.

This concept appears in subject-lessons-hegel-lacan-and-the-future-of-materialism-northwestern-universit (p. 40), in the opening movement of Dolar's argument about the genealogy of materialism as a philosophical position. It functions as a historical foil: mechanical materialism is the first, naive form of the materialist project, and its insufficiency is what compels the engagement with Hegel. The concept cross-references Automaton, Contradiction, Dialectics, Ideology, Phenomenology, and Substance — and its relationship to each is one of contrast or underdetermination. Mechanical materialism is, in a precise sense, the automaton-form of materialism: it operates via uniform, iterable mechanical causality (the signifier-like return of the same explanatory schema) without ever encountering the Real that exceeds it. It lacks the resources of dialectics, which — as the canonical definition shows — treats contradiction as a motor of being rather than an error to eliminate; mechanical materialism's flat causality cannot hold contradiction in productive tension. Similarly, it stands at the antipode of phenomenology in that it refuses the first-person structure of experience entirely, but, like phenomenology, it remains enclosed within a framework that Lacan's structuralism and Hegel's dialectics alike must surpass. Against ideology's constitutive incompleteness (always requiring fantasy as a supplement), mechanical materialism presents itself as complete and sufficient — and this self-presentation is precisely ideological in the Lacanian sense. The concept thus serves Dolar's argument as a negative anchor: the minimal but untenable starting point that any serious materialism — one adequate to Hegel, Freud, and Lacan — must acknowledge and then pass through.

Subject Lessons: Hegel, Lacan, and the Future of MaterialismRussell Sbriglia & Slavoj Žižek (eds.) · 2020 (p.40)

Mechanicism (or 'mechanical materialism,' as this eighteenth-century stance is often labeled), which proposes a uniform mechanical causality to account for all phenomena, bodily and spiritual, without flinching.

The phrase "without flinching" is theoretically loaded: it names the stance's defining gesture as a refusal of hesitation before the most difficult cases ("spiritual" phenomena), marking mechanical materialism's ambition as total and self-sufficient — but this very refusal of hesitation is what condemns it to reproduce idealism's framework rather than escaping it. The pairing of "bodily and spiritual" as a unified explanatory target reveals the Cartesian dualism that mechanical materialism claims to dissolve but in fact inherits and merely overcodes.