The Commission on Sustainable Development (CSD), the intergovernmental body set up to review the implementation of Agenda 21, is in more than one way crucial for the future development of the United Nations system. The Commission is the first organisation within the United Nations system which institutionally links environment and development. In these policy areas, two integration processes can be distinguished. First, environment and development initiatives have to be taken into account in all other areas of policy and law-making, including such important fields as foreign policy and national and international security. Secondly, the interests of actors on the global stage, including states, intergovernmental and non-governmental organisations, are becoming more and more interrelated and convergent.