Archetypal inflation designates the psychic condition in which the ego, consciously or unconsciously, assumes attributes belonging exclusively to the Self or to transpersonal archetypal powers — omnipotence, omniscience, immortality, divine chosenness — thereby transgressing the proper limits of human finitude. The corpus treats this phenomenon as one of depth psychology’s central diagnostic concerns. Jung himself, most extensively in the Nietzsche seminars, observed how an individual or collective unconsciously becomes ‘filled’ with an archetypal content it has not earned by consciousness, producing states indistinguishable from grandiosity or possession. Edinger systematized the concept most rigorously in Ego and Archetype, tracing inflation through myth (Prometheus, Icarus, Ixion), theology (the seven deadly sins, the temptations of Christ), and clinical phenomenology, arguing that all inflation represents an inappropriate ego–Self identity. Von Franz nuanced the picture by distinguishing integrable complexes from archetypal contents that, if ‘integrated,’ would produce precisely the inflationary overexpansion they treat. Schoen applies the concept clinically to addiction, where archetypal over-identification with the divine generates the god-complex and narcissistic specialness that sustain addictive patterns. Hillman alone offers a genuinely critical counter-reading, questioning whether inflation-diagnosis has itself become a weapon of psychological conformism. The shared tension across the corpus concerns humility as antidote: whether deflation, religious practice, or conscientious individuation constitutes the appropriate corrective.