The Constitution of the United States was ever only as valid, as good as it produced what it promised, "a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity"[note the capitalizations, they mean something] and what the common people thought they were buying when they adopted it, democracy. Union, Justice, Tranquility, Welfare, Blessings of Liberty to ourselves and our POSTERITY. Egalitarian democracy is the only political genre which will ever deliver on that bill of goods, exactly the kind of democracy which the aristocratic founders always feared might result from what they were setting up to favor themselves and THEIR posterity. Much of American history has been a struggle by Black people, by Women, by Native Americans, Latinos, Asians, members of religious minorities, LGBT people to force the propertied, white men to give up what was their privileged condition, to make the more ancient Athenian democracy - Roman Republican style government of the Constitution into a real, modern egalitarian democracy. It has been a struggle which has not been peaceful, it has been as violent as the Civil War, as the reaction of the privileged to any struggle to force the extension of the vote, of the abolition of discriminatory laws set up and judged constitutional by Supreme Courts and the reaction to that violence and oppression by the groups whose equality has been resisted. The violence was, likely, established in the Constitution to the extent the Second Amendment was a means of the slave holders to arm the slave patrols*.
The thing is a mess. I am not necessarily advocating that we junk the whole thing because, as the Koch funded attempt at a new Constitutional Convention threatens, what they and the other billionaires enabled under the Constitution as read would certainly be far worse. I would love for the United States to have a new, modern constitution informed by the experience of the failures of the old one over the past centuries of violent struggle and oppression AND INFORMED BY THE THINKING OF MORE THAN A SMALL GROUP OF WHITE MALE ARISTOCRATS. But now, as the Supreme Court has given them the power to use their money-speech to make things worse, that is out of the question. The beginning of a way out of this disaster is to change our own understanding of what went wrong, how the struggle to reach that peak of equality in 1965 went so wrong over the next half century - not least of which was under the libertarian enablement of the media to lie us where we have come to. That was us, we liberals getting suckered and duped by the media - the decision was made on behalf of the New York Times - to a large extent it was us being suckered by lawyers working on behalf of rich people and the media peddling their own privileges as progress.