This report examines why internationally funded programs to disarm, demobilize, and reintegrate militias since 2001 have not made Afghanistan more secure and why its society has instead become more militarized. Supported by the United States Institute of Peace (USIP) as part of its broader program of study on the intersection of political, economic, and conflict dynamics in Afghanistan, the report is based on some 250 interviews with Afghan and Western officials, tribal leaders, villagers, Afghan National Security Force and militia commanders, and insurgent commanders and fighters, conducted primarily between 2011 and 2014.