Well, you see, it's a Real World Theory.
Nations do not have Conscience, they have only Interests and Population.
However, you are free to use your Conscience to resist the Interests of a few million other angry Humans.
You might achieve the Grand Enlightenment of Martyr, if those few million don't succeed in having you defined as a Criminal.
Or, if it's a hundred million people or so, they might write the History in which you never existed.
I can tell you’re a damned Mason and traitor to God and country.
The Declaration was effective when it was signed and it remained and remains effective wherever American forces exercise power over a place. The recognition of the King of Spain was irrelevant to the force and effectiveness of the Declaration, just as if Philip VI King of Spain decides to rescind his recognition we will remain Independent until such time as the last American surrenders and stops fighting.
So worried about other people writing your History.