theatrical expressions of secular Jewish culture may be in specifically Jewish languages such as Hebrew, Yiddish, Judeo-Tat or Ladino, or it may be in the language of the surrounding cultures, such as English or German. Secular literature and theater in Yiddish largely began in the 19th century and was in decline by the middle of the 20th century. The revival of Hebrew beyond its use in the liturgy is largely an early 20th-century phenomenon, and is closely associated with Zionism. Apart from the use of Hebrew in Israel, whether a Jewish community will speak a Jewish or non-Jewish language as its main vehicle of discourse is generally dependent on how isolated or assimilated that community is. For example, the Jews in the shtetls of Poland and the Lower East Side of New York City during the early 20th century spoke Yiddish at most times, while assimilated Jews in 19th and early 20th-century Germany spoke German, and American-born Jews in the United States speak English. Jewish authors have both created a unique Jewish literature and contributed to the national literature of many of the countries in which they live. Though not strictly secular, the Yiddish works of authors like Sholem Aleichem (whose collected works amounted to 28 volumes) and Isaac Bashevis Singer (winner of the 1978 Nobel Prize), form their own canon, focusing on the Jewish experience in both Eastern Europe, and in America. In the United States, Jewish writers like Philip Roth, Saul Bellow, and many others are considered among the greatest American authors, and incorporate a distinctly secular Jewish view into many of their works. The poetry of Allen Ginsberg often touches on Jewish themes (notably the early autobiographical works such as Howl and Kaddish). Other famous Jewish authors that made contributions to world literature include Heinrich Heine, German poet, Mordecai Richler, Canadian author, Isaac Babel, Russian author, Franz Kafka, of Prague, and Harry Mulisch, whose novel The Discovery of Heaven was revealed by a 2007 poll as the "Best Dutch Book Ever". In Modern Judaism: An Oxford Guide, Yaakov Malkin, Professor of Aesthetics and Rhetoric at Tel Aviv University and the founder and academic director of Meitar College for Judaism as Culture in Jerusalem, writes: Secular Jewish culture embraces literary works that have stood the test of time as sources of aesthetic pleasure and ideas shared by Jews and non-Jews, works that live on beyond the immediate socio-cultural