The UN and its predecessor, the League of Nations, were created to institutionalize a new status quo arrived at after the first and second world wars. Both organizations were founded on the basis of defending the right of nations to self-determination. In both cases their charters outlawed pre-emptive strikes and big-power attempts to occupy countries or change regimes. Both stressed that the nation state had replaced empires.
The League of Nations collapsed soon after the Italian fascists occupied Ethiopia. Mussolini defended his invasion of Albania and Abyssinia by arguing that he was removing the "corrupt, feudal and oppressive regime" of King Zog/Haile Selassie and Italian newsreels showed grateful Albanians applauding the entry of Italian troops.
The UN was created after the defeat of fascism. Its charter prohibits the violation of national sovereignty except in the case of "self- defense". However, the UN was unable to defend the newly independent Congo against Belgian and US intrigue in the 1960s, or to save the life of the Congolese leader Patrice Lumumba. And in 1950 the security council authorized a US war in Korea.
Under the UN banner the western armies deliberately destroyed dams, power stations and the infrastructure of social life in North Korea, plainly in breach of international law. The UN was also unable to stop the war in Vietnam. Its paralysis over the occupation of Palestine has been visible for over three decades.
Full story...