Eduard von Hartmann (1842–1906) had expected to follow his father's military career, but an injury forced him to reassess his ambitions. Torn between music and philosophy, he settled on the latter and in 1869 published his first book, The Philosophy of the Unconscious, which proved a great success. Published in 1885 as the period saw an enormous rise in the popularity of spiritualism, this work attempts to give psychological explanations for all occult phenomena, including subjective delusions as well as 'objective' physical manifestations, without resorting to hypotheses of ghosts, demons or trickery. C. C. Massey, a leading theosophist and translator of the work, wrote, 'Now for the first time, a man of commanding intellectual position has dealt fairly by us as an opponent.' This work will appeal to anyone with an interest in the growth of spiritualism and the philosophical and metaphysical debates of the nineteenth century.
Karl Robert Eduard von Hartmann (February 23, 1842 – June 5, 1906) was a German philosopher.
He was born in Berlin, and educated with the intention of a military career. He entered the artillery of the Guards as an officer in 1860, but was forced to leave in 1865 because of a knee problem. After some hesitation between music and philosophy, he decided to make the latter his profession, and in 1867 obtained a Ph. D. from the University of Rostock. He subsequently returned to Berlin. For many years, he lived a retired life of study, doing most of his work in bed, while suffering great pain. He died at Gross-Lichterfelde.