From Wikipedia:
Any thoughts on his type? INTP was my first thought, but I could see INFJ, or maybe something else.Terence Kemp McKenna (November 16, 1946 – April 3, 2000) was an American writer mainly on the subject of psychedelic drugs and their role in society, and existence beyond the physical body. He was also a public speaker, psychonaut, ethnobotanist, art historian, and self-described anarchist, anti-materialist, environmentalist, feminist, Platonist and skeptic. During his lifetime he was noted for his knowledge of psychedelics, metaphysics, plant-based entheogens, shamanism, mysticism, Hermeticism, Neoplatonism, biology, geology, physics, phenomenology, and his concept of novelty theory.