That U.S. intervention in Venezuela runs contrary to international law, or that Donald Trump’s claims to control Greenland are legally specious, is evident to any student of the subject (and not only to academics). The territorial integrity and political independence of a State, the right of peoples to self-determination, the principle of non-intervention in the internal affairs of States, the absence of any right to use force aimed at coercively changing a State’s government, the fight against drug trafficking through cooperation among States as established by the relevant treaties, the rules on diplomatic immunity and so on, are all elements of a minimal normative and institutional architecture that is widely consolidated and shared by the international community—especially, for some of those principles, starting from the years following the Second World War.