Marquis de Sade | The Man and His Age | studies in the history of the culture and morals of the eighteenth century, Dr. Iwan Bloch, translated by James Bruce (Julian Press, 1931, [first american edition]) 6 .5"x9.5", 296pp, hardbound, black boards, red and gilt title on spine, some bumps and wear, good condition for age. Iwan Bloch (1872-1922), the “father of sexology”, was a Berlin dermatologist. His many socio-cultural studies in sexology earned him an international reputation as a medical historian. He also discovered de Sade’s manuscript of the “120 days of Sodom” in 1904, which had been believed to be lost. Together with Magnus Hirschfeld and Albert Eulenburg, Bloch proposed the new concept of a science of sexuality: Sexualwissenschaft or sexology. In 1906 he wrote Das Sexualleben unserer Zeit in seinen Beziehungen zur modernen Kultur [The Sexual Life of our Time in its Relations to Modern Civilization], a complete encyclopedia of the sexual sciences in their relation to modern civilization. According to Sigmund Freud, Bloch's studies were instrumental in the development of the anthropological approach to the theory of sexuality. For example, before Bloch, homosexuality was analyzed using a pathological approach.