I am not sure it was ever very functional. I am not an expert on it at all but it seems like it had two purposes for the US. 1) prevent Nazis (i.e. another world war which metaphysically it seems people believe Right wing views are responsible for war which leads to very specific outcomes we see today) and 2) prevent countries from becoming communist by opening discussions with them.
This article makes the case that the 1965 Immigration Act happened not because anyone in the US wanted it but because the State Dept. pressured Congress to pass it in order to make more allies with Third World countries https://www.migrationpolicy.org/article/geopolitical-origins.... Basically the UN was used as a forum by countries to trash the US which it still is. The USSR propagandized against the US in the Third World.
So honestly the whole UN experiment seems like it was kind of a foreign policy wonk experiment that didn't really serve the interests of US citizens especially now that the USSR fell. But I think the philosophical ideas behind it run very strong in elitist thought in the US. These are that 1) Nationalism is an ever present threat to global peace 2) social engineering should be used to prevent Nationalism/Nazis/etc. 3) Immigration is a tool for statecraft and limiting Nationalism in certain countries. 4) an enlightened class of smarter, educated people should be used to counter Nationalism.
If any of these goals or assumptions are false the whole thing becomes useless.
This article makes the case that the 1965 Immigration Act happened not because anyone in the US wanted it but because the State Dept. pressured Congress to pass it in order to make more allies with Third World countries https://www.migrationpolicy.org/article/geopolitical-origins.... Basically the UN was used as a forum by countries to trash the US which it still is. The USSR propagandized against the US in the Third World.
So honestly the whole UN experiment seems like it was kind of a foreign policy wonk experiment that didn't really serve the interests of US citizens especially now that the USSR fell. But I think the philosophical ideas behind it run very strong in elitist thought in the US. These are that 1) Nationalism is an ever present threat to global peace 2) social engineering should be used to prevent Nationalism/Nazis/etc. 3) Immigration is a tool for statecraft and limiting Nationalism in certain countries. 4) an enlightened class of smarter, educated people should be used to counter Nationalism.
If any of these goals or assumptions are false the whole thing becomes useless.