The German Democratic Party was a liberal political party in the Weimar Republic, considered centrist or centre-left. Along with the right-liberal German People's Party, it represented political liberalism in Germany between 1918 and 1933. It was formed in 1918 from the Progressive People's Party and the liberal wing of the National Liberal Party, both of which had been active in the German Empire.

Theodor Wolff was a German writer who was influential as a journalist, critic and newspaper editor. He was born and died in Berlin. Between 1906 and 1933 he was the chief editor of the politically liberal newspaper Berliner Tageblatt.