Final answer:
The 1815 meeting mentioned is the Congress of Vienna which aimed to stabilize Europe post-Napoleonic Wars. It largely ignored nationalism, affecting areas like Italy and Poland, and sowed seeds for future independence movements.
Step-by-step explanation:
The meeting of many nations in 1815 refers to the Congress of Vienna, a significant event in European history. The main focus of the Congress was to restore stability and order to Europe after the upheaval caused by the Napoleonic Wars. The leaders and diplomats from various European nations, including Austria, Prussia, Russia, and Great Britain, sought to establish a balance of power that would preserve conservative regimes and prevent further revolutions.
National identity and aspirations towards nationalism were largely ignored during these negotiations, which led to discontent among various ethnic and national groups throughout Europe and Latin America. For instance, the Italian and Polish peoples found themselves under foreign domination, with Italy under Austrian control and Poland divided between Russia, Prussia, and Austria.
This disregard for nationalistic tendencies would later fuel movements for unification and independence throughout the 19th and early 20th centuries.