This special edition of the Leading Thoughts, coinciding with the 100th anniversary of Rudolf Steiner’s death (March 30, 2025), marks the first ever bilingual (German-English) publication of his final written work, which he largely composed in the last months of his life (October 1, 1924–March 30, 1925). The Leading Thoughts and the essays that introduce them form the culmination of Steiner’s endeavors to communicate the essence of anthroposophical spiritual science. They deal with the dawn of the Consciousness Soul Age, with Michael’s battle with Ahriman for human intelligence, with the forces of Christ and Anti-Christ, with the future of the Earth and humanity.  

As his last written testament, this volume stands as a bulwark against the dehumanizing forces of modern civilization and as a call to all who would look earnestly at the state of our world and choose, in freedom, to seek a human way forward.

Rudolf Steiner (b. Rudolf Joseph Lorenz Steiner, 1861-1925) was born in the small village of Kraljevec, Austro-Hungarian Empire (now in Croatia), where he grew up. As a young man, he lived in Weimar and Berlin, where he became a well-published scientific, literary, and philosophical scholar, known especially for his work with Goethes scientific writings. Steiner termed his spiritual philosophy anthroposophy, meaning "wisdom of the human being." As an exceptionally developed seer, he based his work on direct knowledge and perception of spiritual dimensions. He initiated a modern, universal "spiritual science" that is accessible to anyone willing to exercise clear and unbiased thinking. From his spiritual investigations, Steiner provided suggestions for the renewal of numerous activities, including education (general and for special needs), agriculture, medicine, economics, architecture, science, philosophy, Christianity, and the arts. There are currently thousands of schools, clinics, farms, and initiatives in other fields that involve practical work based on the principles Steiner developed. His many published works feature his research into the spiritual nature of human beings, the evolution of the world and humanity, and methods for personal development. He wrote some thirty books and delivered more than six thousand lectures throughout much of Europe. In 1924, Steiner founded the General Anthroposophical Society, which today has branches around the world.

Peter Selg studied medicine in Witten-Herdecke, Zurich, and Berlin and, until 2000, worked as the head physician of the juvenile psychiatry department of Herdecke Hospital in Germany. Dr. Selg is director of the Ita Wegman Institute for Basic Research into Anthroposophy (Arlesheim, Switzerland), professor of medicine at the Alanus University of Arts and Social Sciences (Germany), and co-leader of the General Anthroposophical Section at the Goetheanum. He is the author of numerous books on Rudolf Steiner, anthroposophy, medical ethics, and the development of culture and consciousness. Peter Selg studied medicine in Witten-Herdecke, Zurich, and Berlin and, until 2000, worked as the head physician of the juvenile psychiatry department of Herdecke Hospital in Germany. Dr. Selg is director of the Ita Wegman Institute for Basic Research into Anthroposophy (Arlesheim, Switzerland), professor of medicine at the Alanus University of Arts and Social Sciences (Germany), and co-leader of the General Anthroposophical Section at the Goetheanum. He is the author of numerous books on Rudolf Steiner, anthroposophy, medical ethics, and the development of culture and consciousness.

George Adams (1894-1963) was a close student of Rudolf Steiner, and translated many of his lectures given to English-speaking audiences. Beginning in 1935, Olive Whicher worked with George Adams in their research into mathematics and physics until his death in 1963. He translated and published numerous books, lectures, and articles. Thomas OKeefe discovered Anthroposophy while studying philosophy at Kenyon College in Gambier, Ohio, where he graduated with a bachelors degree in 2007. He founded the newsletter Deepening Anthroposophy in 2012, has been a student at the Seminary of the Christian Community in North America, has done editing and translating work for SteinerBooks, Temple Lodge Publishing, Wynstones Press, Occident Verlag, and Inner Work Books, and has been a coworker at the Ita Wegman Institute for Basic Research into Anthroposophy in Arlesheim, Switzerland. He currently works as the editorial director of Chadwick Library Edition, a project that aims to publish new or revised translations of twelve of Rudolf Steiners core written works in special hardcover editions.