Pffects of foreigners staying in Aguascalientes

what countries have broken the principle " Pacta sunt servanda" in the past. Does it tell the future of their reactions?

¿Debe el estado interferir en la economía?

https://drive.google.com/file/d/1l-I9Ed3tqcZlVnCivkUzo-WCbOlTG8FH/view?usp=drivesdk