The scale of globalization post-WW2 puts it on a whole other level. The complexity of supply chains now are such that any country would grind to a halt without imports. The exception here, to some degree, is China, but so far they've been more interested in soft power over military, and that strategy has served them well. Though it seems the US are gearing up for a fight with a fully domestic manufacturing capability and natural resource pools of its own. It would require consistent protectionist policy over multiple administrations to pull something like that off, so it remains to be seen if that's truly possible.