Nathan Birnbaum (; pseudonyms: "Mathias Acher", "Dr. N. Birner", "Mathias Palme", "Anton Skart", "Theodor Schwarz", and "Pantarhei"; 16 May 1864 – 2 April 1937) was an Austrian writer and journalist, Jewish thinker and nationalist. His life had three main phases, representing a progression in his thinking: a Zionist phase (c. 1883 – c. 1900); a Jewish cultural autonomy phase (c. 1900 – c. 1914) which included the promotion of the Yiddish language; and religious phase (c. 1914–1937) when he turned to Orthodox Judaism and became staunchly anti-Zionist. He married Rosa Korngut (1869–1934) and they had three sons: Solomon (Salomo) Birnbaum (1891–1989), Menachem Birnbaum (1893–1944), and Uriel Birnbaum (1894–1956). Early life Birnbaum was born in Vienna into an Eastern European Jewish family with roots in Austrian Galicia and Hungary. His father, Menachem Mendel Birnbaum, a merchant, hailed from Ropshitz, Galicia, and his mother, Miriam Birnbaum (née Seelenfreund), who was born in northern Hungary (in a region sometimes called the Carpathian Rus), of a family with illustrious rabbinic lineage, had moved as a child to Tarnow, Galicia, where the two met and married. From 1882 to 1886, Birnbaum studied law, philosophy and Near Eastern studies at the University of Vienna. Zionism In 1883, at the age of 19, he founded Kadimah, the first Jewish (Zionist) student association in Vienna, many years before Theodor Herzl became the leading spokesman of the Zionist movement. While still a student, he founded and published the periodical Selbstemanzipation!, often written in large part by Birnbaum himself. In it he coined the terms "Zionistic", "Zionist", "Zionism" (1890), and "political Zionism" (1892). Birnbaum played a prominent part in the First Zionist Congress (1897) where he was elected Secretary-General of the Zionist Organization. He was associated with and was one of the most important representatives of the cultural, rather than political, side of Zionism. However, he left the Zionist Organization not long after the Congress. He was unhappy with its negative view of Diaspora Jewry and the transformation of the Zionist ideals into a party machine. His next phase was to advocate Jewish cultural autonomy, or Golus nationalism, concentrating in particular on the Jews of eastern Europe. He advocated for the Jews to be recognized as a people among the other peoples of the empire, with Yiddish as their official language. He ran (in Buczacz, eastern Galicia) on behalf of the Jews (and with the support of the local Ukrainians)