Final answer:
The Congress of Vienna did not open the door to popular unrest and revolution in individual European nations.
Step-by-step explanation:
The false statement about the Congress of Vienna is Its participants opened the door to popular unrest and revolution in individual European nations.
The Congress of Vienna, which took place from 1814 to 1815, aimed to reestablish order in Europe after the disruptions caused by the French Revolution and Napoleonic Era. Its primary goal was to restore the balance of power and maintain peace. The participants formulated a settlement that helped preserve general peace in Europe for nearly a century by redrawing the map of Europe and establishing a system of alliances and principles.
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