In 1873, he became Privatdozent in the philosophical faculty of the University of Marburg; the thesis with which he obtained the venia legendi being Die systematischen Begriffe in Kant's vorkritischen Schriften nach ihrem Verhältniss zum kritischen Idealismus.He was one of the founders of the "Gesellschaft zur Förderung der Wissenschaft des Judenthums", which held its first meeting in Berlin in November 1902.[6] Cohen's most famous Jewish works include: Religion der Vernunft aus den Quellen des Judentums (Religion of Reason out of the Sources of Judaism, 1919),[7] Deutschtum und Judentum, Die Naechstenliebe im Talmud, and Die Ethik des Maimonides.by Samuel Moyn and Robert S. Schine, 2021) and in Reason and Hope: Selections from the Jewish Writings of Hermann Cohen, translated by Eva Jospe (1971).Cohen was an outspoken critic of Zionism, as he argued that its aspiration to create a Jewish state would lead to "return the Jews to History".