This collection highlights multidisciplinary approaches toward better understanding the discourses of extremism, exploring the ways in which insights from linguistics and other disciplines might inform each other in enacting meaningful reforms in policy, social media, and education. The volume is divided into three sections, bridging different disciplinary perspectives in examining different dimensions of the language of extremism in case studies from around the world. The first section features contributions on extremist language from a political lens, such as in election campaigns and media discourse. The second section looks at religious extremism and language used for the purposes of jihadist radicalisation and recruitment. A final section reflects on policy development, peace education, and conflict resolution, toward discussing ways to subvert radicalised discourses and future research building on these efforts. This book will be of interest to students and scholars in discourse analysis, language and communication, and language education, as well as related fields such as psychology, political science, and sociology.