Check out the latest issue of Reason magazine for a great cover story on the most basic purpose of the Second Amendment.
http://tinyurl.com/yom7me
Note that the title is not pejorative. "I would remind you that extremism in the defense of liberty is no vice! And let me remind you also that moderation in the pursuit of justice is no virtue!" - Barry Goldwater
Actually, there are two of the articles form this issue available online, but not hte 2A article - yet. Give it a few weeks or a month and it should be up. All of the back issues are there with their articles. Looks good, some of the older 2A articles appear to have been very positive and pro-2A.