John Brady Kiesling, a twenty-year veteran of the foreign service, publicly resigned his position as political counselor of the U.S. Embassy in Athens in February 2003 to protest the Bush administration's impending invasion of Iraq. He believed that the security, economic, and moral costs of this war, including the blackening of America's image abroad, would far outweigh any benefit to the American people. In Diplomacy Lessons, Kiesling reminds...