International law today touches on nearly every aspect of our lives, from the price of practically everything we purchase, to the health of the environment that surrounds us, to our ability to communicate seamlessly worldwide. These encounters serve as daily reminders that, as Louis Henkin famously put it, “almost all nations observe almost all principles of international law and almost all of their obligations almost all of the time.” Yet at the same time, there are regular reminders that not all nations, groups, or individuals observe all principles of international law or all of their obligations all of the time. International law violations such as human rights abuses, trade law breaches, and law of armed conflict violations remain all ...