In the United States, he found a temporary position at
Princeton University through the assistance of
Abraham Flexner. In 1940, he also worked at
Trinity College (Connecticut). After
World War 2, he worked as a political analyst for the US State Department - he took part in the US delegation to the
Nuremberg trials and also helped draw up a plan for democratizing the occupation zone in Germany. In a 1950 article, Herz coined the concept of the
security dilemma. While at
Harvard University, Herz wrote
Political Realism and Political Idealism, a book which the
American Political Science Association awarded the Woodrow Wilson Prize in 1951. He crafts a theory of "Realist Liberalism." According to a 1952 review of the book, Herz's "approach to the problem of politics is... essentially psychological in character. Man, he thinks, is driven in his relations with other men by two contradictory impulses. Through fear of others he is impelled to seek security in a competitive struggle for power; through compassion for his fellow men, he regrets the sufferings thus entailed, and yearns for universal peace." The following year, he joined
City College of New York, where he taught International Relations until his retirement in 1979. Herz was one of a number of Jewish refugees from Germany who found positions in American universities and taught International Relations from a critical, Realist perspective. He wrote books and several influential articles. He died in
Scarsdale, New York on December 26, 2005, at the age of 97. ==Personal life==