Plane of Immanence

The "Plane of Immanence" is a Deleuzian concept that Zupančič mobilises critically in order to mark the precise point of divergence between Lacan and Deleuze on the question of negativity and the Real. In Deleuze, the plane of immanence designates a single, self-sufficient, undivided field of pure Difference and dynamic becoming — a surface on which all distinctions are differences of degree rather than differences of kind, and on which no exterior or transcendent term interrupts the flow of immanent movement. Zupančič's critical reading identifies this plane as the site at which the tripartite Lacanian topology (original negativity / the Real as crack or hole / surplus-enjoyment / signifying chain) is "liquefied" into a single dynamic movement: the plane collapses the distinction between the negative ground and the positivity that emerges from it, such that "the same thing is both disguising and disguised." On this plane, nothing stands behind or beneath the movement of Difference — negativity is not a gap that persists as such but is immediately converted into productive surplus.

What Zupančič diagnoses as the plane of immanence's theoretical cost, from a Lacanian standpoint, is precisely the erasure of the irreducible third term: the Real. In Lacan, the original negativity (the constitutive crack, the death drive as foundational void) and the surplus-enjoyment or objet petit a that emerges at its place are not the same thing; the asymmetry between them is what generates the subject as a distinct effect. The plane of immanence, by identifying the disguising with the disguised, abolishes this asymmetry and thereby dissolves both the subject (as index of an irreducible gap) and the Real (as a term that cannot be absorbed into movement or process). It is thus a concept that functions, in Zupančič's argument, as a diagnostic marker: it names the structural move by which a philosophy of immanent Difference inevitably becomes unable to account for what Lacanian theory insists upon — a negativity that does not resolve itself into positivity.

This concept appears in two closely related sources — subject-lessons-hegel-lacan-and-the-future-of-materialism-northwestern-universit (p.164) and what-is-sex-alenka-zupancic (p.127) — and in both cases it functions as a critical foil within Zupančič's sustained comparative reading of Lacan and Deleuze. The plane of immanence is not a concept Zupančič endorses but one she uses to locate the limit of Deleuzian ontology from a Lacanian vantage point. Both occurrences are essentially the same argumentative gesture: the plane names the Deleuzian move that collapses the tripartite structure Lacan preserves.

In relation to the cross-referenced canonical concepts, the plane of immanence is most directly implicated with the Death Drive and the Real. The death drive, for Lacan, names an originary constitutive negativity — a crack or hole that does not resolve itself into something else but persists as the structural condition around which the drives congregate and which the subject indexes. The plane of immanence, in Zupančič's reading, is precisely what happens when that originary negativity is denied its irreducibility: it is absorbed into the immanent movement of pure Difference, and what remains is a field in which surplus-enjoyment (Jouissance, plus-de-jouir) and the original void are indistinguishable. This also implicates the Partial Drive and Repetition: where Lacan's drives circle a lost object that remains irreducibly absent (the Real), on the Deleuzian plane the circuit of repetition becomes a self-sufficient productive movement without a persistent hole at its centre. The plane of immanence thus functions in Zupančič's corpus as the name for the philosophical alternative that Lacanian theory must resist if it is to maintain the subject — the barred subject of Fantasy and desire — as a real, rather than merely apparent or epiphenomenal, effect of structure.

Subject Lessons: Hegel, Lacan, and the Future of MaterialismRussell Sbriglia & Slavoj Žižek (eds.) · 2020 (p.164)

This is also what the 'plane of immanence' basically refers to: 'The same thing is both disguising and disguised.' What disappears here . . . is precisely the difference between the original negativity and the surplus that emerges at its place.

The phrase "the same thing is both disguising and disguised" is theoretically loaded because it names the collapse of the Lacanian asymmetry between cause and effect, between the constitutive void (original negativity) and the object that fills it (surplus/objet a) — the very asymmetry that, for Lacan, makes "the Real" and "the subject" distinct and irreducible terms rather than moments in a single immanent process; what disappears, as Zupančič makes explicit, is the difference that grounds Lacanian topology itself.