Observing from afar as the coronavirus pandemic ravages the Old Continent, Grey's words return to mind. And as the Great War changed Europe forever, the COVID-19 pandemic seems to be changing the way European peoples see each other.

"All for one and one for all!" These were the words by which "The Three Musketeers" of Alexandre Dumas lived their lives.

This was the ideal upon which the EU and NATO were built. An attack against one is an attack against all. The Schengen Agreement by which citizens of Europe are as free to travel through the countries of their continent as Americans are to travel from Maryland to Virginia is rooted in that ideal.

Yet, suddenly, all that seems to belong to yesterday.

How the EU's nation-states are reacting to the coronavirus crisis brings to mind another phrase, a French phrase, "Sauve qui peut," a rough translation of which is, "Every man for himself."