In those days, in the Thirties, a German listener could still turn his dial to a score of foreign radio stations without, as happened later when the war began, risking having his head chopped off. And perhaps quite a few did, though it was this observer’s impression that as the years went by, Dr. Goebbels proved himself right, in that the radio became by far the regime’s most effective means of propaganda, doing more than any other single instrument of communication to shape the German people to Hitler’s ends.