The German philosopher Franz Rosenzweig was born in Kassel in 1886 and died in Frankfurt am Main in 1929 De assimilated Jewish family, he studied history and philosophy in Freiburg. His doctoral thesis was on Hegel and the State (1920). He frequented intellectual circles and fought in the German army during World War II. The experience of the war led him to break definitively with idealism. His major work is The Star of Redemption (1921). In Frankfurt he founded the Institute of Jewish Studies, which taught, among others, Buber, Scholem and Fromm. His philosophical system that has emerged very strongly in recent years, it is essential for the understanding of thinkers such as Hegel, Kant and Schelling, as well as to approach more contemporary authors such as Walter Benjamin and Emmanuel Levinas, on which influence of decisively.