be done according to right, for the unjust regulations of men are not to be called or thought rights; since they themselves call that right (jus) which flows from the source of justice: and they say that that assertion which is often made by some persons of erroneous sentiments, namely, that that is right which is advantageous to the most powerful, is false. Wherefore, where there is no true justice there can be no company of men united by a common feeling of right; therefore there can be no people (populus), according to that definition of Scipio or Cicero: and if there be no people, there can be no state of the people, but only of a mob such as it may be, which is not worthy of the name of a people. And thus, if a commonwealth is a state of a people, and if that is not a people which is not united by a common feeling of right, and if there is no right where there is no justice, then the undoubted inference is, that where there is no justice there is no commonwealth. Moreover, justice is that virtue which gives every one his own.
No war can be undertaken by a just and wise state unless for faith or self-defence. This self-defence of the State is enough to insure its perpetuity, and this perpetuity is what all patriots desire. Those afflictions which even the hardiest spirits smart under—poverty, exile, prison, and torment—private individuals seek to escape from by an instantaneous death. But for states, the greatest calamity of all is that of death, which to individuals appears a refuge. A state should be so constituted as to live forever. For a commonwealth there is no natural dissolution as there is for a man, to whom death not only becomes necessary, but often desirable. And when a state once decays and falls, it is so utterly revolutionized, that, if we may compare great things with small, it resembles the final wreck of the universe.
All wars undertaken without a proper motive are unjust. And no war can be reputed just unless it be duly announced and proclaimed, and if it be not preceded by a rational demand for restitution.
Our Roman Commonwealth, by defending its allies, has got possession of the world.