In Iraq, the world’s only superpower finds itself mired in a conflict that it cannot win. History’s mightiest military has been unable to defeat an enemy force of perhaps 20,000 to 30,000 insurgents equipped with post-World War II vintage assault rifles and anti-tank weapons. In Gaza and southern Lebanon, the Middle East’s mightiest military also finds itself locked in combat with adversaries that it cannot defeat. Despite weeks of bitter fighting, the IDF’s Merkava tanks, F-16 fighter-bombers, and missile-launching unmanned aerial vehicles failed to suppress, much less eliminate, the armed resistance of Hamas and Hezbollah. What are we to make...