I read the whole of your post 120, it only applies to the biggest and most powerful countries, just because they are biggest, does not mean they represent fairness, justice and morality.
How do smaller and weaker countries defend themselves, they also have a right to security in the same way as America.
Iran and Korea lack the military might to defend and protect themselves from a more powerful foe. They have little hope of doing so, mainly because of American attitudes.
The Summa was written long before there were any superpowers with nuclear weapons. In fact, in Italy, at the time the Summa was written, there were a batch of city states. With few exceptions (think of Venice, for example), the “superpower” bipolar model you think of didn’t even exist until the second half of the 20th Century.
The fact of the matter is that the Summa is saying that you are authorized to retaliate against wrongdoing and that you are obligated to punish evil. It doesn’t address the size of the countries or anything else.
If you recall your history, though, North Korea attacked South Korea, with the assistance of the Chinese and the Russians. South Korea responded with the assistance of the (then) countries of the nascent United Nations. A truce was reached after many thousands of casualties on both sides, both military and civilian.
If you recall your history, though, Iran violated the US Embassy and took our diplomats hostage. That was a clear violation of Article 22, 27, and 29 of the 1961 Vienna Convention on Diplomatic Relations. It is, in terms of international law, absolutely no different than an invasion of US soil.
As for the two countries not being able to defend themselves…depending upon who they would need to defend themselves against, you may be right. In which case, it would behoove both countries to play nice in the international arena. Acts like selling missiles (N. Korea) and sponsoring terrorists like Hezbollah (Iran) are not playing nice.
If either country decides to REALLY not play nice, then, well…
If North Korea decides to invade South Korea (again), then South Korea has every right in the world and, in fact, is morally obliged, not only to defend itself but to punish the wrongdoers (So says Thomas Aquinas). And that includes invoking mutual defense treaties they may have in place.
If Iran decides to attack Israel (either directly or through proxy), then Israel has every right in the world and, in fact, is morally obliged, not only to defend itself but to punish the wrongdoers (So says Thomas Aquinas). And that includes invoking mutual defense treaties that they may have in place.
If either was to be insane enough to attack the US then the US has every right in the world to defend itself and, in fact, is morally obliged, not only to defend itself but to punish the wrongdoers (so says Thomas Aquinas).
Oh, by the way, for the record, I’m no war monger. I think the grounds for the Spanish-American war were specious at best. I absolutely do not think we had any business getting involved in World War I. And I really think we should have stayed neutral in Saudi Arabia, rather than establishing Elf One back in 1979…the precursor to the Gulf War in 1990 (had those things not happened, the wars that you probably object to probably would never have even been thought about)