Abstract : The authors report on an aggressively interdisciplinary project to survey and integrate the scholarly social-science literature relevant to counterterrorism. They draw on literature from numerous disciplines, both qualitative and quantitative, and then use high-level conceptual models to pull the pieces together. In their monograph, they identify points of agreement and disagreement and point out instances in which disagreements merely reflect difference of research context or perspective. Priorities for further research are suggested and improved ways to frame questions for research and analysis are identified. The questions addressed relate to how terrorism arises, why some individuals become terrorists, how terrorists generate public support, how terrorist organizations make decisions, how terrorism declines, why individuals disengage, and how strategic communications can be more or less effective.