In 1929, Cressey left China, returning to the United States for a year of study at
Harvard University. In 1931, he earned a second PhD, in geography, from
Clark University, writing his dissertation on the Ordos Desert. The same year, Cressey joined the faculty of
Syracuse University as a professor of geography and geology, and soon became chairman of the department. Writing in
Political Science Quarterly, Grover Clark called the book "a clear, comprehensive and yet comprehensible description of the land and the people's relation to it." Although welcomed by the
Kuomintang, the book was "strongly criticized" by the
Chinese Communist Party because of Cressey's judgment that China lacked the resources to quickly become a great industrial power. While teaching at Syracuse, Cressey continued his travels, and in 1937, he visited
Moscow, where he was invited to consult on the production of the
Great Soviet World Atlas. After his trip to Moscow, Cressey traveled widely in the
Soviet Union, and after returning to the United States he spoke of the great economic potential of the country, despite anti-Soviet sentiment. As a result, he earned "the trust and gratitude of his Soviet colleagues," allowing him access to their knowledge and resources. Cressey also spent the 1930s developing the academic offerings at Syracuse, building "one of the best Master of Arts programs in geography available in the United States." ==World War II==