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
John D. Rockefeller Jr. Library Jr. library should not be confused with the Cambridge University Library at the University of Cambridge which was built with funds from John D. Rockefeller and is colloquially referred to as the Rockefeller Library. John D. Rockefeller Jr. Library The John D. Rockefeller Jr. Library, nicknamed "the Rock," is the primary teaching and research library for the humanities, social sciences, and fine arts at Brown University in Providence, Rhode Island. It is one of five individual libraries which make up the Brown University Library. The library was named after John D. Rockefeller Jr., who graduated in the class of 1897.