The Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat biennially issues revised versions of detailed population estimates and projections for over 200 countries, territories, and regional aggregates of the world. Highlights of the latest set, World Population Prospects: The 2002 Revision, were released 26 February 2003 (ESA/P/WP.180) and can be accessed on the web site of the Population Division The estimates (essentially covering the period 1950–2000) and the projections (for 2000–2050) will be published in a series of three volumes, currently under preparation. Key findings of the projections, as presented in the Executive Summary of the document, are reproduced below. The projections incorporate newly revised assumptions of the proximate factors driving population change: fertility, mortality, and international migration. The detailed description of these assumptions is also reproduced.