You can argue that we could have done it without them isnt inherently true. In war, morale is very important. Would we replace them with a president? A man who the majority of the country will have voted again and will despise? Even less people like Britains elected officials than like the monarchy, good luck uniting the people behind a president...

As for a brave fool, I have in my time come to the conclusion that a brave and honoirable fool is better than a wise man. The wise seem to endlessly plan each others dimise

As for a revolution, I hope you arent serious. Very few revolutions with noble goals have ever ended in happiness. and more often lots of sorrow. A revolution may be the only way to "even the playing field", but it will end in another uneven field. This is the invariably truth of humanity, we'll just be wasting time.

Why just go Europe? Because at the moment thats realistic. I can say "The entire Earth should be united" until the cows come home, but to unite a planet you must first unite a continent.

Put it this was; The tribes of Great Britain were transitory componants into the old kingdoms, which were transition states into England, Scotland etc, which were transition states into the UK, which is a transition state into the EU, which will be a transition state into a UE.