Philosopher and German political thinker, of Jewish origin. In 1945, pursued by the nazi Government, was forced to take refuge in the United States. Disciple of Heidegger and Jaspers, received his doctorate with the thesis document of love in San Agustín (1929). His philosophical training is based on the readings of Kant, Kierkegaard, as well as theological and classical works. In United States public, first of all, the origins of totalitarianism (three vols., 1951), devoted to the study of an ideology that leads to Jewish Nazi anti-Semitism, Hitler's and Stalin's European imperialism and totalitarian ideologies that give rise to police societies concentracionarias, which are based on terror, propaganda and domination. Rahel Varnhagen (1958) and Eichmann in Jerusalem. A study on the banality of evil (1963), returned to the Jewish problem. The theme of the great modern revolutions is facing in on Revolution (1963). In this work he/she studied the American, French and Bolshevik, revolutions give supremacy to the first. Also reflects on life in the democracy of the United States, in his book Crisis of the Republic (1972), bringing to light three great realities of public and social life: lying in politics, civil disobedience, and the phenomenon of violence. He/She also wrote the life in the spirit (posthumous, 1978) and an unfinished analysis of Kant's philosophy: readings of Kant's political philosophy (posthumous, 1982).
Philosophical journal, a compendium of the workbooks that the thinker wrote between 1950 and 1973, was published in April 2004 over a thousand pages of reading notes and notes that anticipated the celebration of the centenary of his birth.