Paul Carus (1852-1919) was a German American author, scholar, and philosopher. Born in Ilsenburg, Germany, he studied at the universities of Strassburg and Tübingen, earning his PhD in 1876. After a stint in the army and as a teacher, Carus left Imperial Germany for the United States, settling in LaSalle, Illinois. There, he married engineer Mary Hegeler, with who he would raise seven children at the Hegeler Carus Mansion. As the managing editor of the Open Court Publishing Company, he wrote and published countless books and articles on history, politics, philosophy, religion, and science. Referring to himself as “an atheist who loved God,” Carus gained a reputation as a leading scholar of interfaith studies, introducing Buddhism to an American audience and promoting the ideals of Spinoza. Throughout his life, he corresponded with Leo Tolstoy, Thomas Edison, Nikola Tesla, Booker T. Washington, and countless other leaders and intellectuals. A committed Monist, he rejected the Western concept of dualism, which separated the material and spiritual worlds. In his writing, he sought to propose a middle path between metaphysics and materialism, which led to his dismissal by many of the leading philosophers of his time.