Florida has entered into a permanent contract that cannot be annulled.
You mean a slave contract? In any case, none of the individuals constituting the entity of Florida that entered into said contract are currently living, and none of the individuals constituting the entity of Florida that are currently living entered into said contract.
Ah, the universally recognized legal principle of "might makes right."
And how can you know
a priori whether an independence movement will result in the populace of said territory being more prosperous and/or more free? Wouldn't that require experimentation? And on another note, who or what gets to determine whether the populace of said territory is more prosperous and/or more free? Are those terms not inherently open to interpretation?