"This review seeks to inform United States Agency for International Development (USAID) evaluation of countering violent extremism (CVE) programming in Asia and globally by exploring two research questions: 1. Under current conditions, is it possible to develop a model or methodology to test the relationship between CVE programming and extremist violence? 2. What high-level outcomes other than violence reduction might be linked to CVE programming? What approaches could be used to measure such outcomes? USAID defines violent extremism (VE) as “…advocating, engaging in, preparing, or otherwise supporting ideologically motivated or justified violence to further social, economic, and political objectives.” In practice, the threat posed by religiously motivated violent extremist groups has drawn primary concern. Violent religious extremism can and often does function in combination with aggrieved ethnic identity groups pursuing communal advantages. VE’s defining elements include a desire to reorder society in line with a given ideology and the interests of the group proclaiming the ideology, pursuit of sociopolitical and economic objectives, and a willingness and capacity to use violence as a tactic to pursue these objectives. How individual and community incentives and risk factors, structural conditions, enabling factors, and external triggers interact to produce extremist beliefs, support for VE actors and actions, recruitment into a violent extremist organization (VEO), or violence itself is not fully understood. Correspondingly, CVE programs occur in diverse settings and encompass a variety of interventions and intermediate outcomes. The amount of USAID financial investment in CVE programming in a given country is often small relative to the scale and complexity of the VE problem and its drivers, limiting the change to which a program can aspire and for which it might reasonably be held accountable." (Executive summary)