As a hotbed of violent extremism, Pakistan, along with its Afghan neighbor, has lately received unprecedented amounts of attention among academics and policymakers alike. While the vast majority of contemporary analysis on Pakistan focuses on Sunni extremist groups such as the Pakistani Taliban or the Haqqani Network—arguably the main threat to domestic and regional security emanating from within Pakistan’s border—sectarian tensions in this country have attracted relatively little scholarship to date. Mindful that activities involving Shi‛i state and non-state actors have the potential to affect U.S. national security interests, the Combating Terrorism Center is therefore proud to release this latest installment of its Occasional Paper Series, Shiism and Sectarian Conflict in Pakistan: Identity Politics, Iranian Influence, and Tit-for-Tat Violence, by Dr. Hassan Abbas.