In Conjectures and Controversy in the Study of Fundamentalism, W. Paul Williamson takes a critical look at the sociohistorical emergence of fundamentalism and examines how historians constructed popular, though questionable, conceptions of the movement that have dominated decades of empirical research in psychology. He further analyzes the notions of militancy and anti-modernity as valid characterizations of fundamentalism and examines whether fundamentalism, as a Christian Protestant phenomenon, is useful in labelling global forms of religious extremism and violence. In observing the lack of theory-driven research, the publication offers theories that situate fundamentalism as a social psychological phenomenon as opposed to some personal predisposition. Students and scholars of fundamentalism will discover Conjectures and Controversy in the Study of Fundamentalism to be a provocative study on the topic.