The object of a system of authority is order, not justice. Justice matters only after injustice sufficiently compromises order.
The object of a system of authority is order, not justice. Justice matters only after injustice sufficiently compromises order.
The first result would be the UN getting immediately booted from the United States. The 2nd result would likely be a war between nations backing the UN and nations that will not submit to the UNs assumed authority.
Your question exists as a central tenant in many works of fiction.