But it can only be controlled by organizing a system of national defense against Nature's destroying forces, which can, by touching a button, be instantly transformed, if need be, into a force for national defense against a foreign invasion or to uphold the rights or honor of the nation. CHAPTER III _The Militarists will never initiate an adequate system for national defense in the United States, because such a system necessitates an organization under civil control in time of peace. It must be an organization that will at all times act as a self-operating and self-perpetuating influence to promote peace and prevent war. It must also automatically and instantly become an impregnable defense against foreign attack or invasion if, in spite of all precautions and efforts to prevent it, war should actually occur at any time in the future._ Whatever we do for national defense should be done primarily to _prevent_ and _safeguard against_ the breaking out of war. Every plan for national defense should, like the plan proposed in this book, be formulated with that end in view. That should be its clearly defined objective. There should be no possibility of any mistake about that. It should be made so plain that there never could be any misunderstanding as to that being the primary purpose of the plan. A national force should be organized primarily for civil duty in time of peace. It should be organized in such a way that it could at a moment's notice be converted into a military machine for national defense in case of war. But that conversion should be a secondary object. The necessity for such a conversion should be regarded as a remote possibility, to prevent which every human power would be exerted, but which might occur, notwithstanding all that could be done to prevent it. An illustration of this situation might be drawn from the case of an aëroplane constructed for aërial service. It would be needed and built for work in the air. But if it were possible that it might be needed for use over water, then it might be so constructed that in the event of falling on the water it could still keep afloat and propel itself. Aërial navigation would be the primary purpose of its construction. Water navigation would be secondary, and not intended to be resorted to except in case of accident. It would serve as a safeguard against death which might otherwise be caused by an event only remotely possible.