" The calculations of RNS agronomists suggested that to achieve full self-sufficiency with current technology and at the current standard of living, the Third Reich would need to add 7–8 million empty hectares of farmland to the 34 million hectares currently within its borders.77 It may seem far-fetched to suggest that it was the difficulties of German agriculture that drove the progressive radicalization of Hitler’s regime. But when Hitler did attempt to give concrete meaning to his concept of Lebensraum it was to agriculture that he turned. "

― Adam Tooze , The Wages of Destruction: The Making and Breaking of the Nazi Economy