After invitations to lecture on the Far East to various American universities, he was appointed a lecturer at Columbia University in 1937, associate professor of International Relations there in 1939, and Professor in 1943.
在受美国多所大学邀请进行有关远东的讲座之后，他于1937年被哥伦比亚大学聘为讲师，后于1939年被聘为该校国际关系副教授，1943年升为教授。