This volume is made up two trials that the German Jewish philosopher Günther Anders (1902-1992) wrote during his exile in France. Based on a paper read at the Kant-Gesellschaft in Frankfurt in 1929 (with figures such as Theodor Adorno, Max Horkheimer, Hanna Arendt, Paul Tillich and Karl Mannheim, among others), which was lost during the emigration to France and was rewritten and published in French under the name of philosopher, Günther Stern. The importance of these tests is that, besides having influenced Sartre, are the first anthropological reflection of Anders, essential to understand the basic thesis on the "strange man in the world". With them, Anders the basis of their "negative ontology" of the human being to mark all his later thinking. Both were published by the author in Recherches Philosophiques, Paris. The reader has in his hands the first Spanish version of both texts. Günther Anders was born on July 12, 1902 in Breslau. He studied philosophy and his doctorate in 1923 under the direction of Husserl. He emigrated to Paris in 1933 and in 1936 to the United States. His experience there influence later in his major work Die Antiquiertheit des Menschen (The obsolescence of man, Pre-Texts, 2011). Back in 2007 I was born in the same editorial Man Without world work using philosophical tone, which brings nevertheless texts devoted to writers and artists that, mostly, the author kept a fairly close relationship: Brecht, Broch, Döblin, Heartfield, Grosz and Kafka. As a leading activist of international antinuclear movement, try and, since 1945, responding appropriately to the atomic danger. In 1950 he returned to Europe and settled in Vienna. His extensive written work, little known in Spain so far, was rewarded in life of the author of numerous and important literary, scientific and journalistic awards. He died on December 17, 1992 in the Austrian capital