"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 what they did to be beyond amendment. I knew that age well; I belonged to it, and labored with it...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 change of circumstances, institutions must advance also, and keep pace with the times...Let us [not] 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...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...This corporeal globe, and everything upon it, belong to its present corporeal inhabitants, during their generation. They alone have a right to direct what is the concern of themselves alone, and to declare the law of that direction; and this declaration can only be made by their majority. That majority, then, has a right to depute representatives to a convention, and to make the constitution what they think will be the best for themselves."
-Thomas Jefferson, in a letter to Samuel Kercheval, June, 1812
http://www.nationalreview.com/article/440506/constitutional-amendments-states-convention
http://www.conventionofstates.com/cossim