He created the ideological vision of the 1950s and 1960's vision, where al American Jews of all creeds could unite behind the Zionist cause. His seminal, still used today, is entitled "Patriotismand Plural Loyalties" where- in Greenberg discusses the accusation of dual loyalty directed at American Zionists. This essay has been compare to the recent multi-cultural work of K. Anthony Appiah in Insider/Outsider: American Jews and Multiculturalism. He recast Zionism in an American idiom, Labor Zionists in the 1920s and 1930s drew upon America's own pioneering past, comparing the halutzim-the Labor move- ment's pioneers in Palestine-to the Pilgrim settlers of New England, to the cowboys of the Wild West, and even to Horatio Alger. American Jews viewed Palestine as the new Jewish frontier. Steeped in American mythology, they romanticized the settling of the ancient Jewish homeland as a celebration of "independence, adventure, industry, physical strength, youthful optimism, surety of purpose and expansion". He was in favor of keeping Yiddish alive, he wrote literature in Yiddish, and sought to institute a chair in Yiddish at Hebrew University. He was also involved in attempting to save Yiddish poets. He was instrumental in gaining the support of se- veral Latin American countries for the establishment of the State ofIsrael. He edited a literary journal, Kadima, in Kiev in 1920 with Koigen and Fischel Schneerson.