The course focuses on the transformation of the international order, especially in the field of security. Order transformation is one of the most disruptive types of change in international relations, often associated with contestation, conflict, and often war. Despite its significance, order transformation is difficult to detect, as it starts with small changes, whose impact only becomes clear in hindsight. Yet order transformation affects all levels of policy, institutions, and social practices with significant consequences for security, politics, and governance. The course approaches global security from the perspective of the crisis of the liberal international order. It analyses the features of that order and the phases, causes and implications of its unravelling. It examines the characteristics of the current international system as well as how resilient institutions and forms of global and regional governance might be built in this context. We will then analyze specific empirical cases that highlight the two key concepts studied in this course: order transformation and resilience. These include great power rivalry, European and Euro-Atlantic security, the wars in Ukraine and the Middle East, and the energy transition. In the final part of the course, we will work on strategies to grapple with order transformation and build resilience. The course encourages the development of students’ analytical tools for the study of the global security environment, combining conceptual and policy lenses. Students will gain both topical insights into the current security environment and a preparedness to approach them with both academic and practice-relevant skills.