Paul Carus, Ph.D. (1852‑1919) was a German-American author, editor, a student of comparative religion, and former professor of philosophy.
Life and education
Carus was born at Ilsenburg, Germany, and educated at the universities of Strassburg, France and Tübingen, Germany. After obtaining his Ph. D from Tübingen in 1876 he served in the army and then taught school. He had been raised in a pious and orthodox Protestant home, but gradually moved away from this tradition.
He left Bismarck's Germany for the United States, "because of his liberal views".  After he immigrated to the USA (in 1884) he lived in Chicago, and in LaSalle, Illinois. Paul Carus married Edward C. Hegeler's daughter Mary (Marie) and the couple later moved into the Hegeler Carus Mansion, built by her father. They had six children.
In America Carus briefly edited a German-language journal and wrote several articles for the Index, the Free Religious Association organ.
Soon after, he became the first managing editor of the Open Court Publishing Company, founded in 1887 by his father-in-law. The goals of Open Court were to provide a forum for the discussion of philosophy, science, and religion, and to make philosophical classics widely available by making them affordable.
He also acted as the editor for two periodicals published by the company, The Open Court and The Monist
He was introduced to 
During his lifetime, Carus published 75 books and 1500 articles, mostly through Open Court Publishing Company. He wrote books and articles on history, politics, philosophy, religion, logic, mathematics, anthropology, science, and social issues of his day. In addition, Carus corresponded with many of the greatest minds of the late 19th and early 20th century. Sending and receiving letters from Leo Tolstoy, Thomas Edision, Nichola Tesla, Booker T. Washington, Elizabeth Cady Stanton, Ernst Mach, Ernst Haeckel, John Dewey, and many more.
Carus's world view and philosophy
Carus considered himself a theologian rather than philosopher. He referred to himself as "an atheist who loved God". 
Carus is proposed to be a pioneer in the promotion of interfaith dialogue. He explored the relationship of science and religion, and was instrumental in introducing Eastern traditions and ideas to the West. He was a key figure in the introduction of Buddhism, to the West, sponsoring Buddhist translation work of D.T. Suzuki, and fostering a lifelong working friendship with Buddhist Master, Soyen Shaku. Carus’ interest in Asian religions seems to have intensified after he attended the World’s Parliament of Religions (in 1893).
For years afterwards, Carus was a strong sympathizer of Buddhist ideas, but stopped short of committing fully to this, or any other, religion. Instead, he ceaselessly promoted his own rational concept which he called the “Religion of Science”. Carus had a selective approach and he believed that religions evolve over time. After a battle for survival, he expected a "cosmic religion of universal truth" to emerge from the ashes of traditional beliefs.
Religion of Science
Carus was of the opinion that Western thought had fallen into error early in its development in accepting the distinctions between body and mind and the material and the spiritual. (Kant's phenomenal and noumenal realms of knowledge; Christianity's views of the soul and the body, and the natural and the supernatural). Carus rejected such dualisms, and wanted science to reestablish the unity of knowledge. The philosophical result he labeled Monism.
His version of monism is more closely associated with a kind of pantheism, although it was occasionally identified with positivism. He regarded every law of nature as a part of God's being. Carus held that God was the name for a cosmic order comprising "all that which is the bread of our spiritual life." He held the concept of a personal God as untenable. He acknowledged Jesus Christ as a redeemer, but not as the only one, for he believed that other religious founders were equally endowed with similar qualities.
His beliefs attempted to steer a middle course between idealistic metaphysics and materialism. He differed with metaphysicians because they "reified" words and treated them as if they were realities, and he objected to materialism because it ignored or overlooked the importance of form. Carus emphasized form by conceiving of the divinity as a cosmic order. He objected to any monism which sought the unity of the world, not in the unity of truth, but in the oneness of a logical assumption of ideas. He referred to such concepts as henism, not monism.
Carus held that truth was independent of time, human desire, and human action. Therefore, science was not a human invention, but a human revelation which needed to be apprehended; discovery meant apprehension; it was the result or manifestation of the cosmic order in which all truth were ultimately harmonious.
Criticisms of Carus' ideas
It is claimed that Carus' was dismissed by Orientalists and philosophers alike because of his failure to comply with the rules of either discipline.
The legacy of Paul Carus is honored through the efforts of the Hegeler Carus Foundation, the Carus Lectures at the American Philosophical Association (APA), and the Paul Carus Award for Interreligious Understanding by the Council for a Parliament of the World's Religions (CPWR).
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