Segregation as Ground of Fraternity

Segregation as Ground of Fraternity is a concept Lacan introduces in Seminar XVII to expose the structural precondition of any social bond that calls itself "brotherly." Against the Freudian myth of Totem and Taboo—where fraternity is grounded in the shared crime of parricide and the subsequent guilt that binds the brothers together—Lacan insists that what actually constitutes the fraternal bond is not a shared act or a shared prohibition but a shared exclusion. Brothers are not those who have done the same thing or desired the same object; they are those who have been cut off from the rest together, isolated by some common wall. Segregation—being enclosed, separated, marked off from an outside—is the generative condition of fraternity, not its accidental context.

This formulation carries a pointed critical force within the Seminar XVII argument. Lacan is contesting the adequacy of the Freudian axes of desire and jouissance (the "murder of the father – enjoyment of the mother" schema) to account for the full structure of human sociality. By insisting that truth must be introduced as a third, irreducible dimension alongside desire and jouissance, Lacan implies that fraternal solidarity is not simply a libidinal or identificatory affair but is constituted through a relation to a limit—an outside that cannot be symbolised away. The "something" that isolates people together is neither a shared object of desire nor a shared surplus-enjoyment; it is a structural Real, a boundary that precedes and produces the social interior it encloses.

This concept appears once, in jacques-lacan-seminar-17 (p. 138), at a pivotal moment in Lacan's critique of Freud's Totem and Taboo and his own reframing of the Oedipus myth. Its immediate theoretical neighbours in that seminar are the Discourse of the Master and the Name of the Father. With respect to the Discourse of the Master, Segregation as Ground of Fraternity functions as a socio-political specification: the Master's Discourse produces a social bond by putting knowledge to work and generating a surplus-jouissance that escapes the master—but Lacan is here pushing further, arguing that the very collectivity presupposed by any discourse is itself the product of a founding exclusion. The "brothers" are structurally analogous to the slaves who share the master's jouissance-deficit: they are bound together not by positive identification but by a common lack, a common wall. With respect to Jouissance and Desire, the concept operates as a corrective: neither shared desire (for the same object) nor shared enjoyment (of the same surplus) is sufficient to explain fraternity; what is required is a relation to an outside—an excluded Real—that the other two axes alone cannot capture. With respect to Knowledge, the concept echoes the incompleteness of S2: the community constituted by segregation, like the unconscious, is defined by what it cannot close over. Taken together, the concept positions itself as an extension of Lacanian social theory beyond the libidinal economy of the Oedipus myth, insisting that the political dimension of groupformation is irreducibly tied to a logic of exclusion that precedes and exceeds both desire and jouissance.

Seminar XVII · The Other Side of PsychoanalysisJacques Lacan · 1969 (p.138)

I know of only a single origin for fraternity... it is segregation... No fraternity is even conceivable... except through the fact that people are isolated together, isolated from the rest by something.

The phrase "isolated together" is the theoretical crux: it binds two apparently contradictory predicates—isolation (exclusion, separation) and togetherness (solidarity, community)—into a single structural condition, making the negative act of segregation the positive ground of the fraternal bond rather than its antithesis. The indefinite "something" that does the isolating is equally charged: it refuses to specify the content of the exclusion (a shared crime, a shared jouissance, a shared signifier), pointing instead toward a structural Real—a limit-function—that Lacan insists cannot be reduced to the axes of desire or enjoyment alone.