What was one of the key developments in Europe following the Cold War?

One of the key developments in Europe following the Cold War was the establishment of the European Union with a common currency. This significant integration effort began in the early 1990s and aimed to foster economic cooperation and political stability across European nations. The introduction of the euro as a common currency in 2002 symbolized this deeper integration, promoting trade, simplifying travel and economic transactions among member states, and encouraging a political union that emphasized democratic principles and collective governance. The EU's establishment and expansion also represented a shift towards a more united Europe, aiming to prevent the conflicts that were prevalent during the Cold War era.