Self-organization occupies a generative crossroads in the depth-psychology corpus, where it functions simultaneously as a biophysical principle, a developmental-psychological concept, and an epistemological challenge to homuncular or agent-centric models of the mind. Evan Thompson’s treatment, drawing on Kelso, Maturana, Varela, and Kant, is the most sustained theoretical elaboration: self-organization is defined as spontaneous pattern formation in which the system constitutes its own order through local-to-global and global-to-local dynamics, with no internal executive agent directing the process. This formulation dissolves the distinction between the organizing agent and the organized product—a dissolution Kant had already announced, and which Thompson reads forward through autopoiesis and coordination dynamics. Daniel Siegel imports the concept into developmental neuroscience, arguing that the brain’s self-organizational properties generate states of mind, emotional textures, and attachment configurations. For Siegel, disrupted self-organization manifests clinically as the disorganized attachment that forecloses both internal and external regulation. Philip Flores and Winnicott’s legacy introduce multiple self-organizations as personality subsystems—true and false selves—whose dynamic interplay constitutes character. Across these registers, self-organization names the capacity of a complex system to achieve coherence from within, without external prescription, and its failure or deformation becomes the signature of developmental and psychopathological distress.