Rudolf Steiner (1861–1925) was an influential philosopher, social reformer, and esotericist of the late 19th and early 20th centuries. Born in present-day Croatia, Steiner was a leading figure in the anthroposophical movement—a spiritual philosophy that sought to bridge the gap between science and spirituality. He was a prolific writer and lecturer, with an extensive body of work that includes philosophy, education, agriculture, medicine, and the arts. Steiner completed his doctoral dissertation on Fichte's concept of the ego at the University of Rostock and soon became renowned for his intellectual rigor and insight. One of his most notable works, 'An Outline of Occult Science', presents a comprehensive look at the framework and phenomena of the spiritual world from an anthroposophical perspective. In it, Steiner discusses the evolution of the universe and humanity, the nature of the soul, and the paths of spiritual knowledge. His literary style is methodical yet profound, often challenging conventional scientific thought with a nuanced blend of mysticism and logic. Throughout his life, Steiner worked to implement his ideas practically, establishing the Waldorf educational philosophy, biodynamic farming, and anthroposophic medicine, all of which have lasting legacies today.