Former Associate Justice John Paul Stevens believes District of Columbia v Heller was "unquestionably the most clearly incorrect decision that the Supreme Court announced during [his] tenure on the bench:"
The text of the Second Amendment unambiguously explains its purpose: “A well regulated militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.” When it was adopted, the country was concerned that the power of Congress to disarm the state militias and create a national standing army posed an intolerable threat to the sovereignty of the several states.
Throughout most of American history there was no federal objection to laws regulating the civilian use of firearms. When I joined the Supreme Court in 1975, both state and federal judges accepted the Court’s unanimous decision in United States v. Miller as having established that the Second Amendment’s protection of the right to bear arms was possessed only by members of the militia and applied only to weapons used by the militia. In that case, the Court upheld the indictment of a man who possessed a short-barreled shotgun, writing, “In the absence of any evidence that the possession or use of a ‘shotgun having a barrel of less than eighteen inches in length’ has some reasonable relationship to the preservation or efficiency of a well regulated militia, we cannot say that the Second Amendment guarantees the right to keep and bear such an instrument.”
So well settled was the issue that, speaking on the PBS NewsHour in 1991, the retired Chief Justice Warren Burger described the National Rifle Association’s lobbying in support of an expansive interpretation of the Second Amendment in these terms: “One of the greatest pieces of fraud, I repeat the word fraud, on the American public by special-interest groups that I have ever seen in my lifetime.”
And after Heller came Sandy Hook, Las Vegas, Sutherland Springs...and on and on.