Der Mythus des 20. Jahrhunderts
Newspapers, like other media, were controlled by the state; the Reich Press Chamber shut down or bought newspapers and publishing houses. By 1939, over two-thirds of the newspapers and magazines were directly owned by the Propaganda Ministry. The Nazi Party daily newspaper, the "Völkischer Beobachter" ("Ethnic Observer"), was edited by Rosenberg, who also wrote "The Myth of the Twentieth Century", a book of racial theories espousing Nordic superiority. Goebbels controlled the wire services and insisted that all newspapers in Germany only publish content favourable to the regime. Under Goebbels, the Propaganda Ministry issued two dozen directives every week on exactly what news should be published and what angles to use; the typical newspaper followed the directives closely, especially regarding what to omit. Newspaper readership plummeted, partly because of the decreased quality of the content and partly because of the surge in popularity of radio. Propaganda became less effective towards the end of the war, as people were able to obtain information outside of official channels.