Comment by camgunz
Laws aren't fictitious just because people/countries break them. No one writes a law thinking "that settles that, no more embezzling." Laws simply tell you how that system works: you embezzle, FBI arrests you, you get tried, etc.
Also the US always made a big deal about not joining various treaties, with their reasoning explicitly being "we actually plan to do a lot of things that would violate that treaty." In that sense, that shows the US actually had respect for those institutions.
Also, the west benefited from this arrangement. Most western countries could benefit from the rules based order, and when they needed a little pump, the US broke some rules and brought home a treat for the home team. You might argue this undermines the whole enterprise, but my counterargument is this is the longest period of relative peace and prosperity humankind has ever experienced, so although it wasn't perfect, it was a huge improvement.
Ofcourse people break laws. But they are enforceable and the authorities have absolute power to enforce them. Putin can get away doing whatever the f he wants but nobody in Canada can get away with breaking any law they want whenever they feel like it, for example. That's the difference between the very real Canadian laws over Canadians and "international law" over nobody. Now Canada can pass a law that is in line with some international agreement, but it's still the law of Canada. Other laws don't apply in Canada. Canadian laws don't apply in other countries. And that's about it. If we had world elections, world government, world police, world courts and world laws, with all countries giving up their sovereignty to those institutions then we'd have "international law". Until then we don't.