The Internationalists is a fascinating book. The authors present a clear proposition about the significance of the 1928 Pact for the Renunciation of War for a more peaceful world. My focus is on the role of what the authors call outcasting, as an alternative to war. I argue that outcasting is hardly new. It has been known as reprisals or self-help, and currently as countermeasures. It is essential that such measures are brought under international control. What is more, the current US administration is a threat to the current world order. Other states and civil society need to continue to develop internationally controlled sanctions against violations of international law – also in the absence of the USA.