Who would argue with her?
The Second World War crippled the European economy. The victors suffered almost as much as the vanquished. Nearly ten years after the war ended, the British were still rationing sugar and meat.
Notwithstanding these hardships, however, the history of the post-WWII European economy is mostly a story of economic renaissance. From the rubble of war, the European Continent produced decades of economic growth.
Attempting to perpetuate and enhance that growth trajectory, the leading economies of Europe thought it best to pool their resources. So they formed the “European Union” and abandoned their national currencies in favor of the euro.