Christian Nikolaus Braun is a lecturer in the Defence Studies Department. Previously, he was a Radboud Excellence Initiative Fellow at Radboud University, and a Senior Lecturer in the Defence and International Affairs Department at the Royal Military Academy Sandhurst. Christian holds a PhD in Government and International Affairs from Durham University. Christian's primary area of expertise is the ethics of war and peace. In his research, he grapples with existing and emerging ethical challenges in armed conflict. In addition, Christian studies the historical development and future trajectory of the Catholic just war tradition.

Christian is the author of Limited Force and the Fight for the Just War Tradition (Georgetown University Press, 2023). He has also published widely in peer-reviewed academic journals, including Ethics & International Affairs, Global Studies Quarterly, International Affairs, International Relations, International Theory, the Journal of International Political Theory, the Journal of Military Ethics, and Studies in Christian Ethics.

Christian is also an experienced teacher and supervisor. He has taught and supervised in Germany, the US, and the UK at both undergraduate and postgraduate levels. Moreover, he has experience teaching and supervising both at regular universities and military institutions, including the Royal Military Academy Sandhurst, the Defence Academy of the United Kingdom, and the Royal College of Defence Studies.