Many forms of Government have been tried and will be tried in this world of sin and woe. No one pretends that democracy is perfect or all-wise. Indeed, it has been said that democracy is the worst form of government except all those other forms that have been tried from time to time. -- Speech in the House of Commons (1947-11-11)
My Take - The founders didn't say "In order to form a perfect union", they said "In order to form a more perfect union". Our system of government is flawed, and has been since day one. The same can be said of all of the liberal democracies. The difference between tyranny and our form of democracy is that we are willing to admit that we're not perfect and are willing to find ways to improve without compromising our founding principles. No, I don't believe that the Constitution is a 'living document', but I do believe that if something about the way we're doing business needs to change, then we have to have the intestinal fortitude to either find a way to change and still stay within Constitutional restraints or change the Constitution through the method described in the document so that we can continue to improve.