Well, in 1776 it was King George III and Parliament, who in 1774 unilaterally revoked the 1691 Massachusetts charter and then in 1775 effectively declared war on Americans.
All this despite numerous efforts by Americans to negotiate better terms (i.e., "no taxation without representation") and express their loyalty to the king.
So by July of 1776 independence was not simply "necessary", it was by the acts of Britain an already accomplished fact.
That's why Founders' Declaration of Independence does not express what will be or should be, but what already is, at that time.
Bottom line: for our Founders, "necessity" was in no way a difficult or amorphous ideal requiring the skills of a master-philosopher to discern.
Instead, it was clear and concrete: the Brits revoked our charter of self-government and then declared war on us, therefore of necessity we are free and independent.
So what, exactly is your problem with that, Jeffersondem.
