International Law - for iPod/iPhone

The framework of rules that serve to bind relations between states is referred to as Public International Law. It primarily concerns itself with the actions carried out by or on behalf of states as opposed to private citizens, but how effective is this global system in the 21st century? What are the challenges facing international law? Do states only engage with international courts when it serves their interests?
In this audio discussion Open University Lecturers in Law; Olga Jurasz and Rosemarie McIlwhan assess some of the issues that face any institution that attempts to enforce these rules in addition to analysing how a changing world might affect the future of international law