Written by global, multidisciplinary experts, Explaining Extreme Belief and Behavior moves beyond definitions of the phenomena of conspiracy theorizing, extremism, fanaticism, fundamentalism, and terrorism and shifts into how we can explain these extreme beliefs and behaviors. The first part of the book examines various fundamental theoretical and contextual issues such as the relationship between understanding and explaining extremism, challenges in explaining extreme beliefs, and pitfalls of current approaches. The second part delves into related methodological issues, including the desiderata for viable explanations--qualitative and quantitative data, macro-, meso-, and microlevels of analysis, first- and third-person accounts, attitudes and behaviors, or beliefs and actions. The third part explores related empirical issues and challenges--how we conceive and integrate insights into such related phenomena as the turn to extremism in particular contexts, the rise of extremist movements, and radicalization. This volume builds upon the first two in the Extreme Belief and Behavior Series by studying the very project of explaining extreme belief and behavior.