The Law of Nations or the Principles of Natural Law (1758)Emmerich de Vattel Of Peace, and the Obligation to Cultivate It§ l. What peace is.§ 2. Obligation of cultivating it.§ 3. The sovereign's obligation to it.§ 4. Extent of this duty § 5. Of the disturbers of the public peace.§ 6. How far war may be continued.§ 7. Peace the end of war.§ 8. General effects of peace.
     1.    Nam cum sint duo genera decertandi, unum per disceptationem, alterum per vim, — cumque illud proprium sit hominis, hoc belluarum, — confuglendum est ad posterius, si ut non licet superiore. Cicero, de Offic. lib. i. cap. 11.