In 1860, Adolf Bastian (1826–1905) argued for "the psychic unity of mankind". He proposed that a scientific comparison of all human societies would reveal that distinct worldviews consisted of the same basic elements. According to Bastian, all human societies share a set of "elementary ideas" (Elementargedanken); different cultures, or different "folk ideas" (Völkergedanken), are local modifications of the elementary ideas. This view paved the way for the modern understanding of culture. <answer>Franz Boas</answer> (1858–1942) was trained in this tradition, and he brought it with him when he left Germany for the United States.
Who trained under Bastian's ideas on culture?
Franz Boas