BARTH, Paul (1858—). A German sociological writer. He was born at Baruthe in Silesia, August 1, 1858. He is editor of the Vierteljahrsschrift für wissenschaftliche Philosophie, and a professor (ausserordentlich) in the University of Leipzig. He has written on philosophical subjects, but his Philosophie der Geschichte als Sociologie, the first volume of which appeared in 1897, is the best historical sketch of the development of sociological theory which has been published in Germany. Among Dr. Barth's other writings should be mentioned: Geschichtsphilosophie Hegels und die Hegelianer bis auf Marx und Hartmann (1890); Tiberius Gracchus (2d ed., 1893); Beweggründen des sittlichen Handelns (1889).