The law of nations is naturally founded on this principle, that different nations ought in time of peace to do one another all the good they can, and in time of war as little injury as possible, without prejudicing their real interests.
God is related to the universe, as Creator and Preserver; the laws by which He created all things are those by which He preserves them.
Law in general is human reason, inasmuch as it governs all the inhabitants of the earth: the political and civil laws of each nation ought to be only the particular cases in which human reason is applied.