To what extent can international peacekeeping promote micro-foundations for positive peace after violence? Drawing on macro-level peacekeeping theory, the authors' approach uses novel experimental methods to illustrate how monitoring and enforcement by a neutral third party could conceivably enhance prosocial behavior between rival groups in a tense, postconflict peacekeeping environment.

"Mironova trained as a mathematician, game theorist and behavioural economist....she is one of few researchers to venture directly into combat zones to examine the roots of jihadist terror. Her work has been funded variously by the US National Consortium for the Study of Terrorism and Responses to Terrorism (START), George Soros's Open Society Foundations, the United Nations and the World Bank."

Much has been made of the Islamic State drone threat ever since the group killed two Kurdish soldiers in October 2016 with a bomb hidden within one of its drones that Kurdish forces downed in Iraq. The Islamic State was able to achieve this feat through an act of deception, as the two Kurdish soldiers were killed by the bomb after they had taken the drone back to their base to inspect it. Since this type of attack had not been conducted before, the drone was an unassuming place for the Islamic State to hide an improvised explosive device. But that trick only works occasionally, and it likely has a limited shelf life.

To what extent can prosocial norms (re-)emerge among rival groups following intense intergroup conflict? One school of thought posits that violence can strengthen intragroup bonding norms, entrenching parochialism and sustaining in-group biases. However, recent studies suggest that intergroup bridging norms can also improve once conflict ends. The authors' research offers insights into how prosocial bridging vs. parochial bonding norms evolve after violence.

An emerging literature points to the heterogeneous effects of violence on social norms and preferences in conflict-ridden societies. This article considers how responses to violence could be affected by in-group/out-group divisions. The research uses lab-in-the-field experiments to gauge norms for pro-social behavior in the aftermath of ethnic violence in post-war Kosovo. The study finds that one set of treatments (ethnicity) captures a negative legacy of violence on parochialism, while another (local/non-local) shows stronger evidence of pro-sociality and norm recovery.

"...ISIL also wanted to increase the flow of dedicated foreign fighters. For that, they needed to increase the grievances of Western Muslims who could potentially become fighters. France and Belgium were chosen for an attack because those are countries with large Muslim populations, some of whom had already been attracted to ISIL. The attack could increase anti-Muslim sentiment and, as a result, the grievance of Western Muslims, which could increase the number of potential dedicated foreign recruits."