 Also in 1896, with Friedrich Naumann and Caspar René Gregory, he founded the National-Social Association (National-Sozial Partei), based on Socialist Christianity.The party failed in the elections of 1898 and 1903 and was then dissolved into the Freeminded Union.He was a Member of The Royal Academy for Science and the Arts of Belgium in Brussels, was a Corresponding Member of the Bavarian Academy of Sciences and Humanities in Munich between 1875 and 1917, and a member of the Philology and History class of the Royal Saxon Society of Sciences in Leipzig from 1892 to 1917.