Ego Deflation occupies a decisive structural position within the depth-psychological lexicon, naming the corrective collapse that follows ego-inflation — the state in which the ego has unconsciously appropriated the attributes of the Self. Across the corpus, the term carries both clinical and spiritual valences, and the major voices treat it not as pathology but as a necessary passage on the road toward individuation. Ernest Kurtz, documenting the founding of Alcoholics Anonymous, identifies ‘deflation at depth’ as the indispensable precondition for genuine spiritual conversion, a formulation that Bill Wilson himself received from William James via Silkworth. Ian McCabe and David Schoen extend this into explicitly Jungian territory, arguing that the ego’s submission to the Self — its demotion from sovereign to satellite — constitutes the psychological mechanism underlying the Twelve Steps. Edward Edinger supplies the structural vocabulary: inflation arises whenever the ego operates without reference to the suprapersonal order, and the compensatory psyche responds by engineering deflation as a homeostatic correction. Peterson and Dennett elaborate the cyclical model, reading alcoholic ‘rock bottom’ as a mythopoetic re-enactment of the hero’s death. Neumann, characteristically, situates deflation within the broader drama of ego-Self differentiation, linking it to suffering accepted as a condition of genuine ethical development. What remains unresolved across these positions is whether deflation is primarily a spontaneous unconscious event, a divinely administered grace, or a practice-induced discipline — a tension that gives the term its enduring generative power.