[BrenBarn]

Not exactly a country, but Hong Kong comes to mind. . .

[csomar]

Hong Kong did not collapse. eh, it is doing okay. Sure you have a reduction in liberties but that's not what collapse means.

[Retric]

The people who lived in Hong Kong are worse off today even outside of political freedoms.

[HPsquared]

It's more "regression" or something. "Collapse" implies a dramatic event and something completely broken.

[Retric]

The collapse of the Roman Empire took decades and British Empire had a similarly long decline, but I understand your sentiment.

[HPsquared]

Yes, Gibbon makes for interesting reading. Decline can indeed be prolonged. I suppose it's like how some things get very slowly better over the decades, other things get very slowly worse over the decades.

[danielbln]

Centuries, not decades.

[Retric]

I originally wrote centuries, but there’s reasonable criticism calling something a collapse when there’s periods of renewal and expansion in that timeframe.