Adolf Philipp Wilhelm Bastian (26 June 1826 – 2 February 1905) 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.