Rudolf Steiner (1861-1925) was an Austrian philosopher, social reformer, and esotericist known for founding the spiritual movement called Anthroposophy. He emphasized the importance of spiritual science and sought to integrate science, art, and spirituality in education and social life. Steiner is best known for establishing the Waldorf education system, which focuses on holistic development and creativity in children. He also contributed to various fields, including agriculture with biodynamic farming, and the arts, promoting a unique approach to theater and architecture that reflects his philosophical ideas.