BFLR
What we know now as the Second Amendment was actually the fourth amendment proposed during the initial conventions. The very first amendment, known as “Article the First,” remains unratified and deals with apportionment of representatives to the House. The “original” second amendment was later ratified and became the 27th amendment.
That doesn’t diminish the value or necessity of the current Second Amendment. If anything it lends increased value to it considering the first two were not initially ratified.
Why isn’t the ACLU listed as a subversive organization seeking to overthrow the government?
Both the Federal Convention and James Madison at the VA Ratification Debates opposed a Bill of Rights for precisely the reason we see today.
First, We the People did not grant the power to confiscate arms, so mention them?
Second, JM feared that if rights are itemized, they would be regarded in time (despite the 9th) as our only rights.
Without a BOR, early federal courts would have had to resort strictly to enumerated powers and to the Declaration of Independence, meaning Natural Rights and societal rights.
Why any amendment?
I believe the best way to understand the first ten amendments to the Constitution is by reading the Preamble to the Bill of Rights.
Reading it will be of little consequence if you do not first acknowledge that the Bill of Rights did not grant you rights. The Bill of Rights protected rights you have just because you're a human from interference by the government.
The Preamble to the Bill of Rights
Congress of the United States
begun and held at the City of New York, on Wednesday the fourth of March, one thousand seven hundred and eighty-nine.
"The Conventions of a number of the States, having at the time of their adopting the Constitution expressed a desire in order to prevent misconstruction or abuse of its powers, that further declaratory and restrictive clauses should be added: And as extending the ground of public confidence in the Government will best ensure the beneficent ends of its institution.