This course explores the shifting dynamics of the European Union (EU) in response to evolving security challenges, particularly following the full-scale Russian invasion of Ukraine. Taking a broad view of security, it investigates how the EU has adapted its political, economic, and security frameworks to address these emerging threats while maintaining internal cohesion and expanding its geopolitical influence. The course begins with an analysis of the key security and development challenges the EU has faced since the onset of the war, followed by an exploration of EU enlargement and its geopolitical power in the context of conflict. It delves into the EU's security role within NATO, highlighting the crucial partnership with the United States in shaping Ukraine's future. Economic statecraft concepts such as de-coupling and de-risking are examined, alongside the effects of sanctions on Russia and their broader global economic implications. The course also addresses the relationship between EU integration, growth models, and global value chains, emphasizing the economic adaptations necessary in a post-crisis world. Additional topics include judicial integration, strategies for combating corruption in pre- and post-accession phases, and the role of civil society and youth in driving EU enlargement. The course also considers financial tools for development, such as banking and developmental funds, as well as energy transition and integration. By the mid-term, students will reflect on the interconnections between these themes, providing a comprehensive understanding of the EU's evolving security and political economy in a time of profound geopolitical change.