International law is a crucial part of national and international affairs in the 21st Century as the process of globalisation proceeds rapidly. This was shown most starkly in the responses to the events of September 11 2001. The book is a vital tool to understand and analyse these affairs. This is a fully revised edition that includes recent materials on: international economic law, such as the responses to the "anti-globalization" protests; the regulation of the use of force, including actions in Afghanistan; the territorial administrations by the UN, as in East Timor; the increasing developments in international human rights law, such as the coming into force of the International Criminal Court and national human rights legislation; the clear obligations on States under international environmental law; and the role of non-state actors in the international community.