Dr. Angel M. Rabasa was a senior political scientist at the RAND Corporation. He wrote extensively about extremism, terrorism, and insurgency. He was the lead author of The Lessons of Mumbai (2009); Radical Islam in East Africa (2009); The Rise of Political Islam in Turkey (2008); Ungoverned Territories: Understanding and Reducing Terrorism Risks (2007); Building Moderate Muslim Networks (2007); Beyond al-Qaeda, Part 1: The Global Jihadist Movement and Part 2: The Outer Rings of the Terrorist Universe (2006); and The Muslim World After 9/11 (2004). He completed the research on patterns of Islamist radicalization and terrorism in Europe, and worked on a project on deradicalization of Islamist extremists.

Other works include the International Institute for Strategic Studies Adelphi Paper No. 358, Political Islam in Southeast Asia: Moderates, Radicals, and Terrorists (2003); The Military and Democracy in Indonesia: Challenges, Politics, and Power (2002), with John Haseman; and Indonesia's Transformation and the Stability of Southeast Asia (2001), with Peter Chalk. Before joining RAND, Rabasa served in the U.S. Departments of State and Defense. He was a member of the International Institute for Strategic Studies, the International Studies Association, and the American Foreign Service Association.

Rabasa earned a B.A. and Ph.D. in history from Harvard University and was a Knox Fellow at St. Antony's College, Oxford University.

Dr. Rabasa passed away on September 25, 2016.