The article offers a unique and comprehensive reflection on the 20-year Union (EU), highlighting the multifaceted impacts of their integration across the political, economic, and societal spheres. The novelty of this paper lies in its holistic approach to the Baltic states' evolution from new EU members to proactive leaders. Politically, the Baltic states have transitioned from passive participants to influential actors, particularly in response to regional security challenges, such as the Russian threat. Economically, their adoption of the euro and integration into the Schengen Area have bolstered their stability and growth within the EU's single market. Societally, EU membership has reinforced democratic values and human rights, marking a clear departure from Soviet-era influences. This focus on the small states as proactive agents in shaping EU policy, rather than merely beneficiaries of EU membership, offers a fresh perspective on their contributions to the EU's development over the past two decades. The article brings valuable insights into the broader discourse on EU enlargement and the future trajectory of the European project.