In this novel re-examination of the archetype construct, philosopher Jon Mills and psychiatrist Erik Goodwyn engage in spirited dialogue on the origins, nature, and scope of what archetypes actually constitute, their relation to the greater questions of psyche and worldhood, and their relevance for Jungian studies and analytical psychology today. Arguably the most definitive feature of Jung’s metapsychology is his theory of archetypes. It is the fulcrum on which his analytical depth psychology rests. With recent trends in post-Jungian and neo-Jungian perspectives that have embraced developmental, relational, social justice, and postmodern paradigms, classical archetype theory has largely become a drowning genre. Despite the archetypal school of James Hillman and his contemporaries, and the archetype debates that captured our attention over two decades ago, contemporary Jungians are preoccupied with the lived reality of the existential subject and the personal unconscious over the collective transpersonal forces derived from archaic ontology. Archetypal Ontology will be of interest to psychoanalysts, philosophers, transpersonal psychologists, cultural theorists, anthropologists, religious scholars, and scholars in many disciplines in the arts and humanities, analytical psychology, and post-Jungian studies.