Joseph Campbell’s own words show that he traced mythic parallels to trade-routes and sea-lanes, not Jungian Wi-Fi.
Campbell the Diffusionist: Boats, Not Brainwaves
Cultural Diffusion - Research Articles
Joseph Cambpell, Champion of Cultural Diffusion
A source-by-source catalogue of every passage where Joseph Campbell attributes mythic parallels to real-world cultural diffusion rather than Jungian psychic unity.