I heard Dave Chappelle say once that the Second Amendment is there just in case the first one doesn't work out. Which I thought was pretty funny and clever.
Governments are made of people, and people like control, whether over their own lives or by proxy.
The Anti-Federalists wanted inalienable rights enumerated (Bill of Rights) as a precondition to their signature on the Constitution of the United States because they knew when push came to shove governments would err on the side of control to ensure stability of the state and that means individual liberty would be sacrificed in that pursuit. Having those rights specifically protected in writing helped ensure individual liberty's survival through time.
All 10 amendments to the US Constitution are extremely important. And all should be protected to ensure the liberty of the individual is the backbone of the American way of life.
What is the correct regulation to ensure liberty and stability? That needle constantly moves, and I don't have a clear answer to that.
Love the post @edicted.