There hardly seems to be a global issue in the world today in which the United Nations (UN) is not expected to play a key role. And indeed, despite a persistent gulf between high expectations and the UN's capacities, the organization continues to be a unique and indispensable actor in areas such as peace maintenance, human rights protection, and development. Thoroughly revised and updated, the second edition of this highly acclaimed text provides a concise analysis of the UN, its structure and work, achievements and shortcomings, and its likely role and prospects in the twenty-first century. The new edition covers the latest institutional and structural developments – including the creation of the Peacebuilding Commission and the establishment of a permanent Human Rights Council – and reflects recent debates on UN reform.