This document summarizes the 2015 Quadrennial Diplomacy and Development Review conducted by the U.S. Department of State and USAID. It outlines four strategic priorities for American diplomacy and development: preventing and mitigating conflict and violent extremism; promoting resilient, open, democratic societies; advancing inclusive economic growth; and mitigating and adapting to climate change. It also discusses building dynamic organizations through knowledge management, innovation, risk mitigation, strategic planning and engaging Americans. Finally, it covers investing in a skilled workforce through increasing agility, diversity, and staff support.