I get frustrated when I hear people talk about how x or y isn't in line with the constitution. The truth is a-z isn't in line. What has frustrated me about the libertarian argument is that it is never paired with a realistic path to actually implementing the ideals.
I think that a constitutional convention would be a very good thing to 'refresh' the constitution....
"But it will be said, it is easier to find faults than to amend them. I do not think their amendment so difficult as is pretended. Only lay down true principles, and adhere to them inflexibly. Do not be frightened into their surrender by the alarms of the timid, or the croakings of wealth against the ascendency of the people...
"Some men look at constitutions with sanctimonious reverence, and deem them like the arc of the covenant, too sacred to be touched. They ascribe to the men of the preceding age a wisdom more than human, and suppose that what they did to be beyond amendment. I knew that age well; I belonged to it, and labored with it... I think moderate imperfections had better be borne with; because, when once known, we accommodate ourselves to them, and find practical means of correcting their ill effects. But I know also, that laws and institutions must go hand in hand with the progress of the human mind. As that becomes more developed, more enlightened, as new discoveries are made, new truths disclosed, and manners and opinions change with the circumstances, institutions must advance also, and keep pace with the times...
"Let us follow no such examples (of the European monarchs), nor weakly believe that one generation is not as capable as another of taking care of itself, and of ordering its own affairs. Let us, as our sister States have done, avail ourselves of our reason and experience, to correct the crude essays of our first and unexperienced, although wise, virtuous, and well-meaning councils. And lastly, let us provide in our constitution for its revision at stated periods. What these periods should be nature herself indicates. By the European tables of mortality, of the adults living at any one moment of time, a majority will be dead in about nineteen years. At the end of that period, then, a new majority is come into place; or, in other words, a new generation. Each generation is as independent as the one preceding, as that was of all which had gone before. It has then, like them, a right to choose for itself the form of government it believes most promotive of its own happiness; consequently, to accommodate to the circumstances in which it finds itself, that received from its predecessors; and it is for the peace and good of mankind, that a solemn opportunity of doing this every nineteen or twenty years, should be provided by the constitution; so that it may be handed on, with periodical repairs, from generation to generation, to the end of time, if anything human can so long endure."
"Thomas Jefferson, "Letter to Samuel Kercheval", Monticello, July 12, 1816, in The Portable Thomas Jefferson, ed. Merill D. Peterson (Harmondsworth: Penguin, 1979), pp. 1397-1402.