On the 15th of July I will have the pleasure to act as opponent in a defense at the University of Tartu. I will discuss Birgit Poopuu’s thesis titled “Acting is everything: The European Union and the process of becoming a peacebuilder”. The thesis develops an innovative framework combining insights from post-structuralism and practice theory to study a range of recent CSDP missions. Poopuu argues that the external actions of the EU should be understood as means of telling and acting out a particular identity of Europe.