In the final analysis, is the security dilemma inescapable? Or can the protagonists in world politics learn to live with never-ending insecurities and the risk of attack without producing precisely the outcomes that they wish to avoid? This article explores this fundamental problem for International Relations theory by performing a thought experiment, in which it applies lessons from aikido to world politics. A form of Japanese budo, or martial art, aikido provides practitioners with a method for harbouring insecurities, and for dealing with attacks that may or may not occur, by empathically caring for actual and potential attackers. The article builds on practice theory in assuming that any social order is constructed and internalised through practices, but also capable of change through the introduction and dissemination of new practices. Although an unlikely scenario, aikido practice could serve as such a method of fundamental transformation if widely applied in world politics. Empirical examples ranging from international apologies and security cooperation to foreign aid and peacekeeping operations are discussed, suggesting that contemporary world politics is at times already performed in accordance with aikido principles, albeit only imperfectly and partially.