Collaborative security regimes post-Brexit – estimating the potential for convergence based on the overlap in national strategic documents. A comparative study of EU27 + 1 and the US

Drawing on theories of international regimes and game theoretical approaches this article analyzes the level of overlap in national security strategies, seeking to explore the potential of convergence in security and defense cooperation in Europe post Brexit. It investigates two research questions: 1. What is the potential for future security cooperation in the Euro-Atlantic space post-Brexit? and 2. What areas are more prone to collaboration? The paper applies cluster analysis and a comparative design, using national security strategies as units of study. It finds that there is potential for future convergence between EU27 and the UK at the industrial level, in internal security matters and EU missions.