The role of the Foreign Service Officer of the United States altered radically during and after World War II. John Harr, who served as a staff member of the Commission on Foreign Affairs Personnel in 1962 and as Director of the Office of Management Planning in the State Department for four years, describes the changes and the response of the Foreign Service Corps to them. He provides a direct approach to the understanding of the professional diplomat and of the pervasive force of professionalism in modern American society. He also outlines managerial strategy to meet the growth challenge of the future. Originally published in 1969. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.