This remarkable collection of papers, sponsored by the Centre for International Sustainable Development Law (CISDL), demonstrates that sustainable development serves as a unifying concept with the potential to facilitate much-needed respect for international law and timely implementation of diverse and overlapping international commitments. It builds on the substance of a rich and complex debate at the intersections among economic, social, and environmental law, bringing, together a broad cross-section of viewpoints and voices. The authors review recent developments in WTO discussions and negotiations, and in the recent decision of the WTO Appellate Body, from a sustainable development law perspective. They also survey relevant new developments in trade and economic agreements at regional, inter-regional and bi-lateral levels. The various essays focus on sustainable development aspects of key issues in recent trade negotiations such as the Singapore Issues (investment, competition, trade facilitation, and government procurement), intellectual property rights, investment arbitration and the linkage between the WTO and multilateral environmental accords, (MEAs).