We lack the will to do the necessary evil things that must be done to win. If William Tecumseh Sherman were fighting in Afghanistan the Taliban would be done. He crushed the core Southern States in the Civil War by war to the bone. He looted, raped and burned a path through Georgia that still over 150 years later is remembered. That level of destruction or more is what is required to subjugate a population. I remember a tale about a Roman officer back in antiquity that had a problem with supply convoys getting wiped out. He finally got fed up and went through every village along the route and took all the able bodied men he could find prisoner. He had sharpened stakes embedded along the roadway and every so many paces he had a prisoner disemboweled upon these stakes to die lingering deaths. They were left there until they rotted away. The convoy attacks ceased. I am glad we don't do such things today but I'm sure if it ever got to the point where the US were about to be destroyed we'd do that and worse if necessary.