The United Nations was founded on the principle of ending the last most destructive vestiges of tribalism. Nationalism is anachronism.
We are currently in an Global Environmental Ontological Crisis that requires all nations to be rid of mere territorialism. All species are currently threatened with extinction by the degree to which we collectively have damaged the Earth.
We need to revolutionize the United Nations and not abandon our one hope of a positive future: International Cooperative Remediation of the damage we have done as a species.