Adolf Philipp Wilhelm Bastian was a 19th-century polymath best remembered for his contributions to the development of ethnography and the development of anthropology as a discipline. Modern psychology owes him a great debt, because of his theory of the Elementargedanke, which led to Carl Jung's development of the theory of archetypes. His ideas had a formative influence on the "father of American anthropology" Franz Boas, and he also influenced the thought of comparative mythologist Joseph Campbell.

Carl Gustav Jung was a Swiss psychiatrist and psychoanalyst who founded analytical psychology. He was a prolific author, illustrator, and correspondent, and a complex and controversial character, perhaps best known through his "autobiography" Memories, Dreams, Reflections.