No one stopped Germany from taking land that originally belonged to them. It was when they invaded Poland that started the war. The American Indians were widely scattered and living in late stone age conditions. We also bought the Louisana territory, Florida from Spain, the southwest from Mexico, and Alaska from Russia. We made a treaty with Britian to divide Oregon territory with Canada. We technically didn't take any territory, except Texas which won their independence from Mexico. There were only 10 million native Americans in the US when Jamestown and Plymouth were founded. 90% of native Americans who died, did so from white man's disease and only 10% died in war, so America was very sparsly settled. With our farming and industry, we could support far greater populations than the native Americans. I do however agree we should not get involved in foreign affairs. We need to reindustrialize ourselves, and become energy independent, then we wouldn't need anything from anyone else, except coffee, tea, bananas, and chocolate. This will take time, energy independence should be our no. 1 priority, then give industry tax breaks to return to America, first in the most depressed areas. Textiles, shoes, steel, autos, electronics, should all be made here.