A little Latin for our Monday; from Cicero of course:
Cīvitās bellum sine causā bonā aut propter īram gerere nōn dēbet.
The state ought not to carry out war without good cause or due to anger.
El Estado no debe hacer la guerra sin buena causa o debido a la ira.
How sensible of Cicero to list the two things one must do prior to waging war:
1. Have proper cause; not only proper, but also good.
2. Do not wage war while angry
I believe Sun Tzu could not have put it better. Although he did write it in very similar terms.