What does Brexit highlight about the European Union?

Brexit underscores the potential challenges of political and economic unity within the European Union. The decision of the United Kingdom to leave the EU reveals significant complexities in maintaining cohesion among member states, especially when national interests and identities come into play. It illustrates how differing political ideologies, economic priorities, and concerns about sovereignty can lead to fragmentation within a political and economic union designed for collaboration and collective decision-making. This situation raises questions about the EU's future stability and the willingness of member countries to work together in the face of diverging national interests. Brexit exemplifies how a single member state's decision can impact the unity and functionality of the entire organization, thereby showcasing the difficulties inherent in balancing unity with individual sovereignty.