If the United States announced tomorrow morning that it would no longer use its military for anything but to defend the borders of the homeland, many would instinctively cheer, perhaps not quite realizing what this would mean in practice. But that is the conundrum the Left is now facing. A world without mass slaughter, of the sort of we are seeing every day in Syria, cannot ever come to be without American power. But perhaps this will prove one of the positive legacies of the Obama era: showing that the alternative of American disinterest and disengagement is not necessarily better. For those, though, that care about ideology—holding on to the idea that U.S. military force is somehow inherently bad—more than they care about actual human outcomes, the untenability of their position will persist. That, too, will be a tragedy, since at a time when many on the Right are turning jingoistic or isolationist, there is a need for voices that not just believe in U.S. power, but believe that that power—still, for now, preeminent—can be used for better, more moral ends.
From: Is a Better World Possible without U.S. Military Force? – The Atlantic