The UN Millennium Project has been a unique undertaking. Its 10 task forces, Secretariat, and broad array of participants from academia, government, UN agencies, international financial institutions, nongovernmental organizations, donor agencies, and the private sector created a worldwide network of development practitioners and experts across an enormous range of countries, disciplines, and organizations. The Project was made possible by the unique commitment, skills, and convictions of the task force coordinators, who led their groups to take on some of the most challenging development questions of our generation, and by the task force members, who gave remarkably of their time. This has been a global effort, in the service of a great global cause—the Millennium Development Goals (MDGs). Our Project has been a microcosm of a larger truth: achieving the Millennium Development Goals will require a global partnership suitable for an interconnected world. The world truly shares a common fate. This has been a labor of love for the many participants in the task forces and Secretariat. Individuals have volunteered vast amounts of effort and expertise to the Project. Their contributions, far beyond any reasonable expectation, have immeasurably sharpened and strengthened the messages contained in the Project’s many outputs, including this report, the task force final reports, the newly developed tools for needs assessment, and the advisory support for MDG-based planning in several countries.