The situation became even more unstable. Social change that took place during Indonesia's struggle for independence compelled Soemardjan to study sociology. Kahin helped him to get the documents needed to study at Cornell, with sponsorship from the Ford Foundation, and, in February 1956, he went to Cornell, where he studied all the European theories of sociology. In 1959, Soemardjan returned to Yogyakarta to do the research on social change for his PhD, and after six months, he went back to Cornell to complete the thesis and sit for exams.