If an external force intervenes to give members of a community political self-determination, then that political community will almost surely fail to be truly free, since it is during the people' s struggle to become free by their own efforts that the political virtues necessary for maintaining freedom have the best chance of arising. The reasoning above conforms most closely to which one of the following principles? ['Self-determination is not the first political virtue that the members of a community achieve in their struggle to become free.', 'A community cannot remain free without first having developed certain political virtues.', 'Political freedom is a virtue that a community can attain through an external force.', 'Real freedom should not be imposed on a community by external forces.']