It was not quite what I expected. A few quotes:
Articles: The Real Second Amendment
We must first understand that we did not invent the 2nd Amendment; we inherited it. The justification of the 2nd Amendment is rooted in late 12th and early 13th century England with the innovation of the Welsh; later called English, longbow
They entered London on June 15, 1215 with their militias and forced King John to submit to the rule of law prescribed by the Magna Carta. The Magna Carta subordinated the king to the rule of law based on Henry I's Charter and the notion of common law throughout the realm, and it set England on the path to developing representative parliamentary democracy.
The 2nd Amendment to the U.S. Constitution was derived from our understanding of the British experience that militias were necessary to curb the tyrannical powers of the king
Furthermore, like the militias of the English barons, these state militias were formed ad hoc from the populace as needed on short notice and therefore depended on the populace being already proficient in the art of arms. The only way the Founders of America could guarantee this capability was to encourage civil proficiency in arms and make private ownership and use of arms a tenet of the constitution establishing the government
Limiting the power of the federal government to subjugate the populace is the primary purpose of the 2nd Amendment
What we do with guns is the subject of existing criminal law, but having them is not