And why is that? Don't get me wrong, the Founding Fathers and Framers did a great deal of good things, and I'm thankful for what they did, but it's not like they were these geniuses who came up with flawless documents that can stand the test of time. The first attempt they made ended up being so flawed that it was scrapped within 10 years and replaced by a document that arguably had the possibility of being illegally enacted. Luckily Rhode Island ended up ratifying it, so that problem was avoided.
So you've got the Framers, and they drafted a document that was once again flawed enough that less than a century later, a President had to butcher the principles of that document in order to preserve the unity of the nation.
Too many Republicans, especially Tea Partiers, treat the Constitution like some infallible Bible that solves all problems, when in reality, it is a severely flawed document.
Excellent points; most countries with shorter histories of democracy have made major rewrites to their constitutions - if the Founders were around today, they would not have produced the same document.