All fell apart in the 20th Century, especially after WWII. By then, the innate injustice of one country being allowed to forcibly subjugate another was just too apparent, and yes, one by one subject nations were allowed to vote themselves independent although IIRC most chose to remain in the British Commonwealth.
Ironic thing is is was the Brits themselves who spread that expected level of decency around the world.
Birdwatcher
The Brits didn't give up their empire. They just couldn't maintain it so it collapsed into what it is today,...one of America's bitches.
