Birth occupies a peculiarly overdetermined position in the depth-psychology corpus, serving simultaneously as literal biological event, cosmological principle, psychological threshold, and metaphysical category. Stanislav Grof situates birth at the very foundation of the unconscious, arguing that the perinatal passage structures whole constellations of adult experience — war, sexuality, religious ecstasy, the encounter with death — through what he calls Basic Perinatal Matrices. Otto Rank extends this logic backward and forward in time: in The Myth of the Birth of the Hero, birth is the site where collective fantasy and individual Oedipal conflict converge, generating the hero-mythology shared across cultures. Richard Tarnas and Dane Rudhyar approach birth from the archetypal-astrological axis, treating the natal moment as a precise imprint of qualitative time — the planetary configuration at birth encoding, in Jung’s formulation, the ‘qualities of the year and season.’ Theological strands, especially in John of Damascus, wrestle with whether eternal generation constitutes ‘birth’ in any intelligible sense. Jane Harrison and Joseph Campbell trace birth imagery through initiation rites and divine-child myths, while Merleau-Ponty raises the phenomenological paradox: birth is a condition of experience that cannot itself be experienced. Across all these registers, birth marks the irreversible institution of individual selfhood — the zero-point from which all subsequent psychological, mythological, and cosmological unfolding is measured.