A world without American power endangers America for two reasons: because foes like Russia and China will feel emboldened, and because friends will lose faith in their old ally. “America First” isolationism, far from insulating the country, will only magnify the nuclear risks America faces.As the world’s first atomic power, America has long tried to stop others from going nuclear. Wonks call it the “nth-country problem”: the more countries have nukes, the more others will want them, the likelier the risk of uncontrolled crises, the greater the constraints on American power and the higher the danger that America itself will be nuked. Do you think that NATO countries will be thretened if NATo disintergrates ?

