"In fact, it can be easily argued that original intent of the Second Amendment had nothing to do with the right of self-defense—which remains the ethical case to be made for owning a firearm. The amendment seems to have been written to allow the states to check the power of the federal government by maintaining their militias."

The above came from a paragraph about 3/4 of the way through the article.
I agree with the first sentence, in that the matter has been often argued his second sentence can also "be easily argued" however recent SCOTUS decisions appear to be in conflict with the authors interpretation of the Second Amendment.