How has the International Criminal Court (ICC) been able to evolve into a fairly effective, albeit relatively untested multi-level model of global governance? This volume explores this question and the novel predicament it represents for understanding the challenges of extending globalgovernance and promoting global justice. It focuses on the novel dynamics and design of the ICC and the role played by realpolitik factors such as the UN Security veto and intra-state competition in shaping and testing the cosmopolitan dimensions of the Court. To study these focal points and tounderstand the political challenges shaping the policies of the ICC, the book adopts a synergistic model based on four levels of responsibility, ranging from the state's negative responsibility not to harm its own citizens to the positive, open-ended global responsibility of the ICC Prosecutor. Themodel offers the basis of the book's cutting-edge, innovative approach, a "cosmopolitan political realism" , which encompasses and interweaves four International Relations theoretical perspectives: rationalism, constructivism, communicative action theory, and cosmopolitanism. Guiding this model isthe metaphor of the switch levers of train tracks, in which the Prosecutor and Judges serve as the agents switching (and criss-crossing) the tracks of realpolitik and cosmopolitanism. With this visual aid, the volume shows just how the ICC has become one of the most intriguing points of intersectionbetween law, politics, and ethics.