Emil Ludwig (25 January 1881 – 17 September 1948) was a German-Swiss author, known for his biographies and study of historical "greats.
Emil Ludwig (originally named Emil Cohn) was born in Breslau, now part of Poland, on 25 January 1881. Born into a Jewish family, he was raised as a non-Jew but was not baptized. “Many persons have become Jews since Hitler," he said. "I have been a Jew since the murder of Walther Rathenau, from which date I have emphasized that I am a Jew.” Ludwig studied law but chose writing as a career. At first he wrote plays and novellas, also working as a journalist. In 1906, he moved to Switzerland, but, during World War I, he worked as a foreign correspondent for the Berliner Tageblatt in Vienna and Istanbul. He became a Swiss citizen in 1932, later emigrating to the United States in 1940.