David Rockefeller his graduate studies, he received a Ph.D. from the University of Chicago in 1940. After completing his studies in Chicago, he became secretary to New York Mayor Fiorello La Guardia for eighteen months in a "dollar a year" public service position. Although the mayor pointed out to the press that Rockefeller was only one of 60 interns in the city government, his working space was, in fact, the vacant office of the deputy mayor. From 1941 to 1942, Rockefeller was assistant regional director of the United States Office of Defense, Health and Welfare Services. Rockefeller enlisted in the U.S. Army
America Is in the Heart attention to Filipino American writers “whose exilic writings did not fit with the immigrant ethos” of America. One of Bulosan’s most important themes as a writer was the importance to find one’s identity in America. Bulosan reveals his faith and love for America in the end of "America Is in the Heart". This sentiment is repeated in an essay entitled Be American, where Bulosan described American citizenship as a “most cherished dream”. Even if his writing did seem more conducive to the accepted image of immigrants, Bulosan opened the door for later writers to push the envelope of acceptance. Filipino-American