To achieve Lebensraum, Hitler cautioned against what he saw as a dangerous Weimar policy of demanding a return to the 1914 borders. Foremost and inexcusable in his mind, the borders would not unite all ethnic Germans under the Reich. To commit to a nation of all German-speaking peoples, the borders of 1914 must be abandoned as incompatible with racial unity and their arbitrary nature. Open advocacy of border restoration would only urge a coalition to form against Germany before it could raise an army to achieve its ends. Further, he believed that empty saber rattling on this issue would shift public opinion against Germany in support of France's anti-German measures, and even if it was achieved, it would guarantee only instability without achieving the racial goals that he sees as so central to German vitality.