Personality reorganization occupies a pivotal position across multiple registers of depth psychology and trauma theory, designating the structural transformation of the self that occurs — or must be deliberately cultivated — in the aftermath of overwhelming experience. The corpus reveals no single, consensual theory, but rather a constellation of overlapping frameworks. Janet’s foundational insight, transmitted through van der Hart and the structural dissociation tradition, treats reorganization as the teleological aim of phase-oriented treatment: the reintegration of dissociated personality parts through synthesis, personification, and presentification, culminating in what phase-three treatment terms ‘personality integration and rehabilitation.’ Ogden and the sensorimotor tradition situate reorganization at the intersection of somatic and psychological assimilation, insisting that the body’s survival-related machinery must be ‘turned off’ before genuine structural change is possible. Schore’s neurobiological framing understands reorganization as the updating of limbic circuit-level structure-function relationships, linking developmental plasticity to clinical transformation. Jung gestures toward a more archetypal register, invoking the mandala as a symbol of inner ‘refounding and reorganization,’ while Siegel’s complex-systems perspective frames it as the achievement of coherence across discontinuous self-states. A core tension animates the field: whether reorganization is primarily a matter of top-down narrative integration, bottom-up somatic regulation, or the structural dissolution and re-fusion of dissociative parts.