Ever read any big histories of the British Empire? Even the ones specifically designed to make them look awful (i.e. every book on the subject ever written after, say, 1960) show a civilization just brimming with confidence, and they accomplished amazing things. We on the right know, for instance, that the Atlantic slave trade was stopped by the British navy and not, say, transgendered disabled Wiccan performance artists. They decided it was a moral evil, and ended it. Just. Like. That. Was it “imperialism?” Sure. But no more slavery. Imperialism ain’t all bad.
This is germane because we’re the first unquestionably top-dog civilization to a) deny that it is the top dog, and b) act like it’s not the top dog, and c) actively try to take away its own top-dog status. The left would cheer all three of those things, and it’s true that some aspects of American “cultural imperialism” are rather ugly. But there’s never a situation where nobody’s the top dog; it’s only a choice between this hegemon (to slip into grad-school-speak for a second) and that one. Think America sucks? Oh, you’re gonna love taking orders from the ChiComs.
And let’s face it, no one asks “What would Britain do?” anymore; Her Majesty’s Government is more concerned these days with making life easier for the criminal element and propping up the corpse of Global Warming™.