Closely

"In recent years it has been suggested that the Second Amendment protects the "collective" right of states to maintain militias, while it does not protect the right of "the people" to keep and bear arms. If anyone entertained this notion in the period during which the Constitution and the Bill of Rights were debated and ratified, it remains one of the most closely guarded secrets of the eighteenth century, for no known writing surviving from the period between 1787 and 1791 states such a thesis."
--Steven P. Halbrook
Attorney, author
Source: That Every Man Be Armed: The Evolution Of A Constitutional Right, P. 83 (The Independence Institute 1984.).