From Environmental Action to Ecoterrorism? offers perhaps the clearest and most comprehensive examination of radical environmental groups and tactics to date, and does so in a balanced and richly narrated manner. Taking the Animal Liberation Front, Earth First! and the Sea Shepherds as case studies, Nagtzaam focuses upon the processes by which persons and groups undergo radicalization and come to embrace political violence. Tracing the evolution of group strategies, leaders, and philosophies, his detailed narrative and careful theoretical and empirical analysis underscore the need for a better understanding of radicalization processes. Scholars and students interested in the development of radical environmentalism or in the dynamics of more militant forms of environmental resistance will find much to explore. Those merely interested in the history and internal dynamics of radical environmentalism as a social movement, and the cautionary tale that it contains, will also find much to admire in this engaging book.' --Steve Vanderheiden, University of Colorado at Boulder, US'In a volume that is non-alarmist in tone, yet inherently attentive to the fact that such groups can constitute challenges to law enforcement and society more generally, Nagtzaam enhances our understandings of radicalisation, reaffirming that it is a process not just currently confined and relevant to Islamist groups and exclusivist nationalist organizations. He approaches and frames radical actors and radicalisation in a neutral, technical manner, advocating that neither should be inherently associated or equated with violence and terrorism. His study also reinforces that while mainstream environmental and animal rights groups and their more militant counter-parts occasionally share affinities, they are distinguished by very different philosophies and modes of operation on resolving ecological crises.' --Peter Lentini, Monash University, Australia