After the publication of Martin Heidegger's diaries (the so-called Black Notebooks), it is necessary to have new points of view on his philosophy. This important essay contributes to this task. Being aware of the statements he made about "world Jewry" and his political obstinacy after the Second World War, we can no longer enter into Heidegger's thought without examining it, at the same time, in the context of the emergence of such ideas. unacceptable Peter Trawny, as editor of the Cuadernos negros, is one of the most knowledgeable of the work, and probably the best person to undertake this task. This critical introduction of Heidegger's philosophy takes into account the new perspectives around the new vision that has led to the publication of the Black Notebooks and introduces us to his thinking, addressing both the problematic aspects and their extraordinary importance in the context of the philosophy of the twentieth century.