We should distinguish between two kinds of foreign intervention. Those that are like “emergency room” operations and others that more resemble “elective surgery. In “elective surgery” wars, you might use elite, fast-reaction troops, sparingly, committing them for a brief time, perhaps for their ability to shock and overwhelm. Only then, the elite shock troops -- e.g. airborne and Marines -- should be withdrawn again, to concentrate on readiness for either an emergency or some more important policy endeavor. Whether a projection of force is an emergency operation or an elective enforcement of national policy -- truthful evaluation of short and long term costs is essential. If the nation must sacrifice its warriors, its treasury, its international goodwill and peace of mind, then we should be called upon to mobilize, as our ancestors did, rich and poor, to willingly pay whatever must be paid. If convinced, millions would step up to enlist. And the rich would, as in times past, come forward to offer billions.