The United States hasn’t truly fought since the ninth of August in 1945. As the radioactive dust settled over Nagasaki, and peace with Japan was secured, we gave up war. We have not fought one since. Rather, we have engaged in a half century of half measures, in which we have deployed our military repeatedly but never actually used it once. That is not meant to disrespect the courage and accomplishment of two generations of American servicemen, but rather to acknowledge the failed leadership which has directed them. Since the police action in Korea, we have been led by successive...