...The only legal mechanism available to the US, Saenz Peña said, was the recognition of Cuban belligerency and declaration of neutrality. In fact, anticipating the UN Charter by nearly half a century, Saenz Peña articulated an approach to jus ad bellum premised on
self-defence, instead of gunboat diplomacy: “Intervention”, he said, “does not proceed except in the case of aggression or positive threat to the security of the State; but then it stops being intervention, to become the unalienable right of
self-defence. One may think instead that the terms are...