Paul R. Mendes-Flohr is a leading scholar of modern Jewish thought. As an intellectual historian, Mendes-Flohr specializes in 19th and 20th-century Jewish thinkers, including Martin Buber, Franz Rosenzweig, Gershom Scholem and Leo Strauss.

Martin Buber was an Austrian-Jewish and Israeli philosopher best known for his philosophy of dialogue, a form of existentialism centered on the distinction between the I–Thou relationship and the I–It relationship. Born in Vienna, Buber came from a family of observant Jews, but broke with Jewish custom to pursue secular studies in philosophy. He produced writings about Zionism and worked with various bodies within the Zionist movement extensively over a nearly 50-year period spanning his time in Europe and the Near East. In 1923, Buber wrote his famous essay on existence, Ich und Du, and in 1925 he began translating the Hebrew Bible into the German language reflecting the patterns of the Hebrew language.