The European Union is an economic and political union of 28 European countries that provides its 500 million citizens with opportunities for education, work, travel, and cultural exchange. It was established after World War 2 to foster cooperation among European nations and prevent future conflicts. Starting with 6 founding members, it has expanded over the decades and now works together on issues like trade, climate, education, and regional development to improve life for all Europeans. Key EU institutions include the European Commission, Parliament, Council and Court of Justice which work to propose and pass laws and policies for the union.