The compartmentalized self occupies a contested but structurally central position in depth-psychological discourse, appearing across trauma theory, dissociation studies, Internal Family Systems (IFS), and cultural criticism. The concept designates a condition in which discrete psychic sectors—each with its own affective tone, belief structure, and behavioral repertoire—operate in relative isolation from one another, resisting the integrative synthesis that constitutes a coherent, adaptive personality. In trauma literature, particularly in the structural dissociation model advanced by Van der Hart, Nijenhuis, and Steele, and elaborated sensorimotorically by Ogden, compartmentalization is understood as a neurobiologically organized response to overwhelming experience: the defensive and quotidian action systems of the personality fail to integrate, generating alternating, encapsulated self-states. For Schwartz’s IFS framework, compartmentalization manifests as ‘parts’ sequestered by protective configurations, insulated from the Self’s governing influence. Von Franz, working from a Jungian and cultural-diagnostic standpoint, reads compartmentalization as a symptom of civilizational decay. Van der Kolk approaches it phenomenologically, describing internally distinct ‘ways of being’ with their own agendas. The central tension across these traditions is whether compartmentalization is primarily pathological—a failure of integration to be therapeutically overcome—or structurally inevitable and even, in limited conditions, adaptive. All major voices concur that healing requires restoring communication across dissociated sectors rather than eliminating any constituent part.