The constitutions of the various states indicated an individual rights viewpoint at least 66 times..
Pennsylvania: 1776: That the people have a right to bear arms for the defence of themselves and the state; and as standing armies in the time of peace are dangerous to liberty, they ought not to be kept up; And that the military should be kept under strict subordination, to, and governed by, the civil power. Declaration of Rights, cl. XIII.
Vermont: That the people have a right to bear arms for the defence of themselves and the State -- and as standing armies in time of peace are dangerous to liberty, they ought not to be kept up; and that the military should be kept under strict subordination to and governed by the civil power. Ch. I, art. 16 (enacted 1777, ch. I, art. 15).
Kentucky: 1792: "That the right of the citizens to bear arms in defense of themselves and the State shall not be questioned." Art. XII, § 23.
Connecticut: Every citizen has a right to bear arms in defense of himself and the state. Art. I, § 15 (enacted 1818, art. I, § 17).
In US v Cruikshank. 1876, SCOTUS recognized that "The right there specified is that of "bearing arms for a lawful purpose." This is not a right granted by the Constitution. Neither is it in any manner dependent upon that instrument for its existence." However, the federal government and all of its power exist solely because of the Constitution. No Constitution, no governmental authority, no militia, no military, yet the right to keep and bear arms for lawful purposes would still exist.
Without the recognition of an individual right to keep and bear arms, Miller, whose entire appeal was based upon that right, would have no standing to have his case reviewed by SCOTUS.
There have been six major pieces of gun control legislation passed by Congress, all prior to Heller: NFA 1934, Gun Control Act of 1968, Firearm Owners Protection Act (including the Hughes Amendment) of 1986, the Brady Act, the Assault Weapons Ban and the Lautenburg Amendment.
The word militia isn't mentioned a single time in any of them. The words "individual", "person" and "citizen" are repeated hundreds of times.
In 1982 the Senate published a report entitled "the right to keep and bear arms report" that affirmed an individual rights viewpoint.
The claim that Heller changed the interpretation of the right protected by the Second Amendment from a collective to an individual viewpoint simply has no merit.