We voluntaryists believe that no true progress can be made until we frankly recognize the great truth that every individual, who lives within the sphere of his own rights, as a self-owner, and has not himself first aggressed upon others by employing force or fraud in his dealings with them [and thus deprived himself of his own rights of self-ownership by aggressing upon these same rights of others], is the only one true owner of his own faculties, and his own property.