You don't need self-determination. Really, you don't. You didn't have to leave, and you didn't have to set up your own government. All that "hold these truths to be self-evident" stuff*, much overrated. And listening to Montesquieu is just silly. To start with, nobody can spell "Montesquieu", and if you hadn't listened to him, then you wouldn't need to, hmmm?
Rest of the post can be found here.
Oh, the pain of A-Level politics.