  From 1900 to 1916, Buber and his life-partner, the author Paula Winkler (1877–1958; pen-name: Georg Munk), moved to Berlin where they befriended the anarchist Gustav Landauer (1870–1919) and attended the salon of the Hart brothers, an epicenter of Jugendstil aesthetics. Early on in this period Buber was active in the Zionist movement of Theodor Herzl, who recruited him as the editor of his journal Die Welt. In 1904, the year Herzl died, Buber finished his dissertation on the problem of individuation in Nicholas of Cusa and Jakob Boehme and he took a position as literary editor for Ruetten &amp; Loening, a publishing house whose mid-nineteenth century Jewish founders (Rindskopf and Löwental) had made a fortune with the perennially best-selling Struwwelpeter, a politically incorrect book of drawings about ill-behaved children (Wurm, 1994). At the beginning of the century, the publisher was looking to move beyond the gilded editions of Goethe and Schiller that they were publishing at the time. Buber became their agent of modernization. One of the first books Buber placed here was his retelling of the stories of Rabbi Nachman, one of the great figures of Eastern European Hasidism. The flagship publication edited by Buber was an ambitious forty-volume series of social studies, titled Die Gesellschaft, that appeared between 1906 and 1912. As editor, Buber recruited and corresponded with many of the leading minds of his time.