The organization of a Europe unified under Napoleonic hegemony in 1820 is laid out in this r/imaginarymaps map.
Dark blue denotes areas directly included in the Napoleonic empire, while lighter shades identify client states. (Of note, I think, is the partition of France's rivals of Austria, Prussia, and even Spain, and the aggrandizement of allies Bavaria and Saxony, as well as the reestablishment of autonomous Polish and Hungarian states.) The creator notes that, though the Napoleonic empire eventually fell to revolution in the 1840s, it left a lasting imprint on Europe, with a preference for continental unification among later generations of Europeans.
This leads me to consider three different lines of attack with regards to this scenario.
1. How would this particular Napoleonic scenario evolve? Though the Bonapartes ended up losing control of Europe, they still changed the face of Europe permanently. France's Great Power rivals are gone, and unless someone reassembles something--German unification, maybe?--France will have no rivals in Europe, especially if France keeps the Rhine frontier.
2. How likely was the possibility of a Napoleonic conquest of Europe? Napoleon's temptation to overreach was his downfall, but the Napoleonic regime was sufficiently attractive in many respects, a synthesis of the pre- and post-Revolutionary orders, to find many followers across Europe. Was there a single POD?
3. What consequences would a 19th century unification of Europe have on the long-run development of the European continent? Especially if this unification was enduring, it could have huge consequences. At least some economic historians, for instance, have traced the lag in GDP per capita in northwestern Europe versus the United States to the division of Europe into protectionist nation-states. A unified Europe might well have seen accelerated economic transformation.
Dark blue denotes areas directly included in the Napoleonic empire, while lighter shades identify client states. (Of note, I think, is the partition of France's rivals of Austria, Prussia, and even Spain, and the aggrandizement of allies Bavaria and Saxony, as well as the reestablishment of autonomous Polish and Hungarian states.) The creator notes that, though the Napoleonic empire eventually fell to revolution in the 1840s, it left a lasting imprint on Europe, with a preference for continental unification among later generations of Europeans.
This leads me to consider three different lines of attack with regards to this scenario.
1. How would this particular Napoleonic scenario evolve? Though the Bonapartes ended up losing control of Europe, they still changed the face of Europe permanently. France's Great Power rivals are gone, and unless someone reassembles something--German unification, maybe?--France will have no rivals in Europe, especially if France keeps the Rhine frontier.
2. How likely was the possibility of a Napoleonic conquest of Europe? Napoleon's temptation to overreach was his downfall, but the Napoleonic regime was sufficiently attractive in many respects, a synthesis of the pre- and post-Revolutionary orders, to find many followers across Europe. Was there a single POD?
3. What consequences would a 19th century unification of Europe have on the long-run development of the European continent? Especially if this unification was enduring, it could have huge consequences. At least some economic historians, for instance, have traced the lag in GDP per capita in northwestern Europe versus the United States to the division of Europe into protectionist nation-states. A unified Europe might well have seen accelerated economic transformation.