1833-1911 1855-1936 1858-1917 1858-1918 1864-1920 193 20thcentury 301 artistic beliefanddoubt beliefs biography civilization contributionsinsociologysimmel credulity delusions dilthey durkheim ferdinand georg german germany history influence(literary influence(psychology) influencesimmel intellectuallife logic max methodology modern money personality persuasion(psychology) philosophy philosophyandsocialsciences politicalsociology reasoning socialpsychology socialsciences sociologists sociology tönnies weber wilhelm émile