" Autarky was central to the Nazis’ political campaigns, and the theme of freeing Germany from its dependence on a hostile world clearly struck a chord with voters. The canny party propagandist Joseph Goebbels wrote in 1932 that a nation that couldn’t manage to get control over the “necessary space, natural forces and natural resources for its material life” would inevitably “fall into dependence on foreign countries and lose its freedom.” The outcome of the First World War and the nature of the postwar world had proven this clearly, he claimed. “Thus a thick wall around Germany?” he asked. “Certainly we want to build a wall, a protective wall. "

― Benjamin Carter Hett , The Death of Democracy: Hitler's Rise to Power and the Downfall of the Weimar Republic