Prime Mover

The "Prime Mover" as it appears in Copjec's reading names the classical philosophical figure—ultimately Aristotelian and then scholastic—that is invoked to solve the problem of bodily unity and subjective freedom. In Aristotle's physics, the Prime Mover is the unmoved cause that imparts motion and teleological direction to the whole; transposed into the philosophy of the body and the will, it becomes the hypothetical supernatural guarantee that the corporeal sum "hangs together" and that human freedom of thought remains coherent. Copjec deploys this figure critically: the Prime Mover is precisely what must be presupposed when one refuses to acknowledge language's constitutive cut. The body's unity and the will's apparent freedom are retroactively attributed to a transcendent power only because the more fundamental, immanent operation of the signifier—which divides the subject from a part of itself—has been suppressed or misrecognized.

Copjec's argument is that the classical philosophical recourse to a Prime Mover is not a neutral metaphysical option but a symptomatic cover for the Lacanian logic of the automaton. Where the automaton (Aristotle's own category of chance/failure of final cause) designates the signifying chain's mechanical repetition—a causality without a grounding telos—the Prime Mover is the retroactive fantasy of a final cause that would close the gap the automaton leaves open. The Prime Mover thus functions ideologically: it naturalizes the endless, asymptotic structure of desire by displacing its true source (the primary detachment produced by language's cut) onto a supernatural agency. For Lacan, and for Copjec reading him, it is precisely this detachment—not Bergsonian illusion, not metaphysical deficiency—that generates the Eleatic paradoxes of motion and the inexhaustibility of desire.

This concept appears in radical-thinkers-joan-copjec-read-my-desire-lacan-against-the-historicists-verso (p. 49), where Copjec is mounting a sustained argument about causality and repetition against historicist and Bergsonian frameworks. The Prime Mover functions there as a foil or symptomatic philosophical figure: it is what classical and idealist thought reaches for when it cannot bear the Lacanian conclusion that bodily unity and freedom of the will are not grounded in any positive, transcendent guarantee. Its conceptual role is therefore essentially negative — it names the fantasy that the automaton's causality (mechanical, signifier-driven, without final cause) is supposed to displace.

The concept is most directly cross-referenced with Automaton: the Prime Mover is precisely the "final cause" whose absence defines the automaton in Aristotle's Physics, and Copjec's move is to show that Lacan's rehabilitation of automaton-causality makes the Prime Mover not just unnecessary but ideologically motivated. It also resonates structurally with Desire and Death Drive: the endless, asymptotic circling that desire performs around the lost object (objet a) is exactly what the fantasy of a Prime Mover would close off by providing a terminal telos. And insofar as the Prime Mover is a phantasmatic solution to the anxiety produced by the subject's constitutive split — the splitting that language's cut imposes — the concept also touches Anxiety: the Prime Mover is, in effect, the imaginary suture that wards off the anxiety of a subjectivity with no transcendent anchor.

Read My Desire: Lacan Against the HistoricistsJoan Copjec · 2015 (p.49)

This something else is, of course, the well-known Prime Mover… the whole sum of the body functions, the entire corporeal presence, is assumed in order to maintain man's freedom of thought and will. But ironically this sum depends for its existence on our supposing the intervention of some supernatural power

The phrase "the whole sum of the body functions, the entire corporeal presence, is assumed in order to maintain man's freedom of thought and will" is theoretically loaded because it exposes the circular logic at the heart of classical faculty psychology and idealist philosophy of action: bodily unity is not given but assumed — retroactively posited — as the condition of freedom, and this assumption then requires "some supernatural power" to underwrite it. The word "ironically" signals Copjec's critical point: the very totalization of the body that is supposed to guarantee immanent freedom ends up depending on a transcendent intervention, revealing that the Prime Mover is not a solution but a symptom of the failure to reckon with the automaton's causality.