For the first time since it began operating in 2002, the International Criminal Court has put the U.S. in its sights. On Nov. 3, ICC Prosecutor Fatou Bensouda initiated an investigation into alleged war crimes and crimes against humanity committed in Afghanistan since mid-2003. This raises the alarming possibility that the court will seek to assert jurisdiction over American citizens.

Located in The Hague (alongside such dinosaurs as the International Court of Justice, which decides state-versus-state disputes), the ICC constitutes...