moreover UN is flawed fundamentally, its charter give all states equally member of community , yet some states have veto power, ie contradicts itself.
it even cant work without veto as big power fear small states lobby against , and those big powers contribute much of funding for UN.
only international political system that can work well is balance of power. We are in age of new balance of power in formation. The USA losing its grip allowing multi-polarity to emerge. however due to economic dependency this multipolar world will be much more connected than ever in past.

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~A journey of a thousand miles must begin with a Single Step. (LAO-TZU, Tao Te Ching)