The Anthroposophical Society in America is the U.S. branch of the international movement founded by Rudolf Steiner in the early twentieth century, centered on anthroposophy, a spiritual philosophy that also underlies Waldorf education, biodynamic agriculture, and anthroposophic medicine. It is headquartered in Ann Arbor, Michigan, and coordinates regional branches and study groups nationwide. The society publishes educational materials and hosts conferences on Steiner's work.