The idea that the expression of radical beliefs is a predictor to future acts of political violence has been a central tenet of counter-extremism over the last two decades. Not only has this imposed a duty upon doctors, lecturers and teachers to inform on the radical beliefs of their patients and students but, as this book argues, it is also a fundamentally flawed concept. Informed by his own experience with the UK''s <i>Prevent</i> programme while teaching in a Muslim community, Rob Faure Walker explores the linguistic emergence of ''extremism'' in political discourse and the potentially damaging generative effect of this language. Taking a new approach which combines critical discourse analysis with critical realism, this book shows how the fear of being labelled as an ''extremist'' has resulted in counter-terrorism strategies which actually undermine moderating mechanisms in a democracy. Analysing the generative mechanisms by which the language of counter-extremism might actually pr