This book analyses Member States’ and EU neighbours’ national visions for the enlargement of the European Union (EU), highlighting 41 national histories, policies, and corresponding public perceptions of European integration and discusses how Russia’s aggression in Ukraine has reignited interest in EU enlargement, with differing national views on when and how eastern neighbors and the Western Balkans should be admitted to the EU. The book contains policy recommendations for national governments and the EU on how to implement enlargement effectively.