More than a third of the international organizations (IOs) active on the world stage in 1992 were created by formal international agreements among countries. Most of the rest were created by existing international bodies. It is hard to imagine how world affairs would operate without international bodies such as the United Nations and its affiliates, international financial institutions such as the International Monetary Fund and the World Bank, or functional bodies such as the Universal Postal Union or the International Civil Aviation Organization. Nevertheless, the record shows that international organizations are not permanent fixture on the world scene, but that they are being created and dying all the time. Can international organizations be a viable tool of foreign policy? This paper explores the pros and cons, offering arguments from different viewpoints on this issue, including the moral issues involved.