フェルディナント・ラッサール
Grottkau was initially highly influenced by the electorally-oriented ideas of Ferdinand Lassalle. By 1871 Grottkau was already a member of the General German Workingmen's Association and worked as an organizer for the burgeoning social democratic movement. He also served as editor of the official organ of the Bricklayers Union, "Grundstein," and as editor of the radical "Berliner Freie Presse."