The document is a letter introducing the publication "Global Trends 2030: Alternative Worlds" by the National Intelligence Council. It summarizes some of the key aspects of how this report was created, including expanding international outreach and collaboration, a focus on disruptive technologies, and including a chapter on potential trajectories for the US role internationally. It encourages readers to explore the scenarios and interactive materials on their website to consider challenges and opportunities over the next 15-20 years.