that's a complete non sequitur    nothing will "work" in any country, browns will be flooded into every nonbrown place until revolution (which will cause total economic collapse) or there are too many browns to be supported because browns actually consume more than they produce economically (total economic collapse). when there arent enough whites working for the global order either through choice or scarcity, 90% of the browns on the planet will die in like one generation. at that point, you could reconquer the world even if all you had left was 10,000 whites somewhere with 1800s technology. they'd find the chinese fighting with bows and arrows and the africans fighting with sticks and rocks.
United States