[The "utopian" national socialism - a mutual dispute in the philosophy of Martin Heidegger and Carl Friedrich von Weizsäcker?].

In a letter to his wife from October 14, 1943, Werner Heisenberg describes a fierce clash with Carl Friedrich von Weizsäcker. The sudden conflict raises numerous questions, two of which are tackled here. First: How is now the friendly relationship between Heisenberg and Weizsäcker in the postwar years to be understood? The answer is: as a strategic performance. Second: How are the radical opinions to be explained that Weizsäcker expressed at the time? A thorough reconstruction of the lifelong connection that Weizsäcker maintained with Martin Heidegger and Heidegger's philosophy gives the answer: the young Weizsäcker was fired up by the "utopian" National Socialism with which Heidegger trumped the real existing.