Heidegger was not only an affiliate of the NSDAP (German Obrero National Party) until the war ended, but the Thinker of Nazism. Movement considered by its philosophy as the historical-spiritual event of Germany and the only political possibility to save the West of Nihilism, it has its reason for being in rational-calculating thought, mode (not) to think that it is in close hermeneutical relationship with The economic life of the Jews and their idea of the world and man. Philosophy is geopolitical because from its origins it consists of the struggle for being, and it is, in this sense, so, for Heidegger, and after the rectorate, Nazism involved a glorious internal truth that he had to reveal. The originality of this book is that, at least in the Spanish language, it helps to delve into the deep connection between Heidegger and Nazism before, in and after rectorate but from philosophy.