The Congress of Vienna was considered a success because it was the first time in history that on a continental scale national representatives came together to formulate treaties, instead of relying mostly on messages from the several capitals. The Congress of Vienna was a conference headed by the monarchs of Austria and it was to provide a long-term peace plan for the superpowers of Europe and to have stability in Europe.
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There are many things that can explain the rise of global inequality during the Industrial Revolution but the most significant is that the industrialized nations relied heavily on the non-industrialized for materials.