Libertarian philosophy holds that the preservation of individual liberty is in the best long term interest of the nation. Collective action that directly serves that goal is well within libertarian philosophy. It is anathema to libertarianism when it becomes detrimental to that goal.
"Libertarian philosophy holds that the preservation of individual liberty is in the best long term interest of the nation. Collective action that directly serves that goal is well within libertarian philosophy. It is anathema to libertarianism when it becomes detrimental to that goal."
Well, that may be a part of the libertarian philosophy but the Von Mises Institute essentially believes that the government is the most dangerous threat to liberty. Consequently, almost all of the material coming from this Insitute denies any legitimate role for the state and rejects all forms of compulsion. This article specifically rejects any form of collective defense if it is compulsory.
Would you care to explain how a non-compulsory national defense would work?