beginning of the 20th century, these newly arrived Jews built support networks consisting of many small synagogues and Landsmanshaften (German and Yiddish for "Countryman Associations") for Jews from the same town or village. American Jewish writers of the time urged assimilation and integration into the wider American culture, and Jews quickly became part of American life. Approximately 500,000 American Jews (or half of all Jewish males between 18 and 50) fought in World War II, and after the war younger families joined the new trend of suburbanization. There, Jews became increasingly assimilated and demonstrated rising intermarriage. The suburbs facilitated the formation of new centers, as Jewish school enrollment more than doubled between the end of World War II and the mid-1950s, while synagogue affiliation jumped from 20% in 1930 to 60% in 1960; the fastest growth came in Reform and, especially, Conservative congregations. More recent waves of Jewish emigration from Russia and other regions have largely joined the mainstream American Jewish community. Americans of Jewish descent have been successful in many fields and aspects over the years. The Jewish community in America has gone from being part of the lower class of society, with numerous employments barred to them, to being a group with a high concentrations in members of the academia and a per capita income higher than the average in the United States. Self-identity Scholars debate whether the historical experience of Jews in the United States has been such a unique experience as to validate American exceptionalism. Korelitz (1996) shows how American Jews during the late 19th and early 20th centuries abandoned a racial definition of Jewishness in favor of one that embraced ethnicity. The key to understanding this transition from a racial self-definition to a cultural or ethnic one can be found in the Menorah Journal between 1915 and 1925. During this time contributors to the Menorah promoted a cultural, rather than a racial, religious, or other view of Jewishness as a means to define Jews in a world that threatened to overwhelm and absorb Jewish uniqueness. The journal represented the ideals of the menorah movement established by Horace M. Kallen and others to promote a revival in Jewish cultural identity and combat the idea of race as a means to define or identify peoples. Siporin (1990) uses the family folklore of ethnic Jews to their collective history and its transformation into an historical art form. They