How did the Congress of Vienna maintain peace in Europe for almost forty years?

The Congress of Vienna, held in 1814-1815, established a balance of power in Europe by redrawing national boundaries and creating a framework for diplomatic relations among the major powers. It aimed to prevent any single nation from becoming dominant, particularly after the upheaval caused by the Napoleonic Wars. The concert of Europe, a system of regular meetings and consultations among the great powers, facilitated cooperation and conflict resolution. This diplomatic approach, along with the restoration of monarchies, contributed to relative stability and peace in Europe until the outbreak of World War I.