Afrikan Spir
![Photograph of Afrikan Spir taken by [[Frédéric Boissonnas|Fred Boissonnas]] c.1887 (Fonds Fred Boissonnas, Bibliothèque de Genève)](https://upload.wikimedia.org/wikipedia/commons/7/7d/Photograph_of_Afrikan_Spir_%28cropped%29.jpg)
His book ''Denken und Wirklichkeit'' (''Thought and Reality'', 1873) had a significant influence on several eminent philosophers, scholars and writers such as Hans Vaihinger, Friedrich Nietzsche, William James, Leo Tolstoy and Rudolf Steiner. Provided by Wikipedia