He writes about the start of the euro in 1999 when the single currency was adopted by 11 countries.

"They didn’t just say yes to a new currency as a medium of exchange; they consciously decided to transfer part of their sovereignty to the European level.

"With its Libra plan for a global digital currency, Facebook has shown both economic and political ambitions. The project would mean a private company controlling a common good and taking over tasks normally discharged by states. This is unacceptable for both economic and political reasons".