Why and how do conflicts break out? This panel aims to answer this important question in security studies from interdisciplinary perspectives. First, disinformation is a growing and present danger against states, governments, companies, and even individuals. The fake news, but also the industrial production of lies and semi-lies could weaken western alliance and many other countries. Disinformation serves always interests (power, economy, etc.). Second, a multidisciplinary approach is of central importance to understand cyber security. The research question is how to conceptualize cyber security in a multidisciplinary manner. The methodological approach is to bring together and discuss theoretical contributions of concept formation, conceptual debates on international security and multidisciplinary understandings of cyber security to contribute to the development of a comprehensive theoretical concept of cyber security. Third, nationalism is both the central concern of students of international security and the core theme of the conference itself. In fact, exclusive nationalism that leaders sometimes manipulate has long been considered as a significant cause of war by famous scholars, including Jack Snyder, Stephen Evera, Barry Posen, Randall Schweller, and John Mearsheimer. Fourth, preventing domestic terrorism is important comtemprary agenda, but it critically relates to the problem of individual freedom and right. How can forces of homeland security efficiently counter domestic terrorism and increase the safety of their citizens whilst affording them more privacy, freedom and protection of rights? This panel bring these themes together and discuss their challenges and prospects.