The World Tree stands within the depth-psychological corpus as one of the most densely layered cosmological-psychological symbols, commanding attention from phenomenologists of religion, analytical psychologists, and mythographers alike. Eliade establishes the ethnological baseline with precision: the World Tree is simultaneously an imago mundi, an axis mundi, and a vehicle of shamanic ascent, encoding tripartite cosmologies across Central Asia, Siberia, Mongol, and Southeast Asian cultures. Its roots in the underworld, trunk in the middle earth, and crown in the heavens constitute a living geometry of the cosmos. Jung and his school receive this image not as cultural curiosity but as an autonomous psychic event: the tree spontaneously recurs in patients’ dreams and paintings as a symbol of the self conceived as process, of individuation dynamically unfolding through time. In ‘Alchemical Studies’ and the Philosophical Tree essay, Jung tracks how the World Tree becomes, in Western esoteric tradition, both arbor mundi and arbor philosophica — the world-axis contracted into the opus alchymicum. Neumann reads the tree through the Feminine archetype, locating the tree goddess at the convergence of birth, solar generation, and death. Campbell extends the symbol horizontally across mythologies, treating Yggdrasil as the paradigm case of a universal image that also conceals the mystery of conscious self-sacrifice. What unites these voices is a shared insistence that the World Tree is irreducible to botanical metaphor: it is the psyche’s own diagram of its vertical structure and regenerative telos.