The European Union has yet to figure out what it wants to be when it grows up: federation, confederation or tertium genus between centripetal and centrifugal forces ... waiting for Godot

What is the European Union? A federal state? A confederation of states? Neither one nor the other but rather a tertium genus of the legal system? For years, the Doctrine has been questioning the nature of the European Union, also analyzing the jurisprudence of the Court of Justice EU and of the Constitutional Courts and Supreme Courts of the Member States; a strong debate between two visions of Europe: one more federalist and another closer to the Nations and the states. This paper, after a detailed examination not only of a legal nature, reaches conclusions of special doctrinal interest.