Passport to Pimlico? (For anyone that remembers that film).
I guess they are, but would they want to. Do they have in place everything they need to be self supporting and self governing? The UK within the EU does have.
At least you're honest.
To me, this is the dark side of nationalism. Where does it end?
There are two forces in this world at the moment: one side trying to bring countries closer together, and the other side taking them further apart through isolation. Given human history, I do not have much faith in the latter.
You could argue that the world would be a more peaceful place if continents and countries divided themselves up so finely that every person of every particular race, religion, culture and political view had their own place to live with people just like themselves. However, this self-serving bias would likely cause much tension and conflict between each group - similar to how it does now in many countries across the world.
I do not think this world will reach its highest potential of peace and prosperity until people set this aside and work together, even if it's sometimes not easy, even if it's not perfect, and even if some things are more beneficial to others than themselves. However, when the human race as a whole turns toward that idea is anyone's guess.
I mean Christ, the UK is still the UK. We still have our own land, language, currency, monarchy, elected Government, public sector bodies, councils, laws, justice system, culture, towns, cities, people, sports teams, economy, films, television, national anthem, cuisine, businesses, industries, media, schools, university, science, healthcare, military, overseas territories, relationships, alliances and so much more. Yes, we may share some of those things with others, but they still make the UK the country it is.
Plus, we still have the self-determined right to leave this "club" at any time in the future even if we remain this year. Sovereignty is defined simply as "supreme power or authority". That option alone gives us sovereignty. We alone have that power.
Whilst we may cooperate to make decisions with the European Union, whilst we may share resources at times, and whilst we may not always get our own way, I will always be proud of the UK for taking that step, even if it just ends up lasting for 0.8% of the 6000 years of human civilisation so far.