"Communism would never work." "Anarchism would never work." "Libertarianism would never work." We so often hear this common refrain. But how do we define "works"? Does our present day society work?
North Korea works very, very well for the Kim family. America does not work well at all for the 1% of its population in jails and prisons, nor for the homeless, nor for the tens of thousands of Americans who die every year from not having health insurance. The Islamic State worked well for Sunni extremist men. China isn't working for its Uyghur population living in concentration camps by the millions.
What works better? A society were 100% of the people have a mediocre standard of living, or a society where 90% of the people have a very high standard of living while the other 10% are crushed by destitution and slavery?
If we define "works" by a society not collapsing under its own weight, then the Roman Empire did not work. If a society must also be fit to resist external threats to be considered in working order, then none of the European countries conquered by Napoleon were working in the 19th century.
If you spent a month living on the streets and then got back on your feet, was your country working all along? What if you spent a decade living on the street?
As far as I can tell, the statement "x would not work" is pretty much universally made by people privileged enough to be content with their lives under the existing system.
If I had to define what it means for a state to work, I would define it as the state that has secured a high standard of living for its people that upholds human rights and preserves liberty as much as realistically possible. And by that definition, no state has ever worked. States don't work.