Well, we’re supposed to, and we should, but apparently we don’t always.
In any case, here’s some interesting articles on the subject. Read on!
A 1982 Senate Comittee Report on the 2nd Amendment
A memorandum for the Attorney General on whether the 2nd Amendment secures an individual right
The Second Amendment and the Historiography of the Bill of Rights
Armed Citizens, Citizen Armies: Toward a Jurisprudence of the Second Amendment
The Firearms Owners’ Protection Act: A Historical and Legal Perspective