" My personal position on counterinsurgency in general, and on Iraq and Afghanistan in particular, could therefore be summarized as "Never again, but..." That is, we should avoid any future large-scale, unilateral military intervention in the Islamic world, for all the reasons already discussed. But, recognizing that while our conventional war-fighting superiority endures, any sensible enemy will choose to fight us in this manner, we should hold on to the knowledge and corporate memory so painfully acquired, across all the agencies of all the Coalition partners, in Afghanistan and Iraq. And should we find ourselves (by error or necessity) in a similar position once again, then the best practices we have rediscovered in current campaigns represent an effective approach: effective, but not recommended. "

― David Kilcullen , Accidental Guerrilla: Fighting Small Wars in the Midst of a Big One