This is a nice book. The author gives the rundown of climate movements of the past few years, focusing on Ende Gelände, Extinction Rebellion, and Fridays for Future. He's clearly actually been part of a lot of those actions and, as far as I can tell, he gets them pretty right. The tone is hopeful all in all and the central idea – that there should be a more militant flank focused on destruction of fossil fuel emitting devices like SUVs and pipelines – is made well, in particular the clear but charitable case against ideologues of pacifism in activism.

However, and this bugs me deeply, the author does not actually answer the question posed in the title. Nowhere in the book is there any kind of guideline of tactical advice or even finger-point to resources on how to go about this. There is no map of pipelines in Europe, no overview of IEDs used in attacks, no hint at ecotage manuals the author would find valuable. And even if the author wanted to address merely the best ways of building this radical flank, some advice on how to organize people for the kind of action the author wants to see, like coordinated SUV destruction or regular-enough pipeline attacks to make fossil fuel an investment risks, is sorely missing. The author does talk about the more militant first wave of eco activists around 2000, noting that the hundreds of thousands of acts of property destruction and violence committed by the likes of the ELF did not yield lasting success because they failed to be flanking a larger mass movement, but gives no hands-on advice for how to do better.

I believe this is a missed chance because I'm assuming the book is targeting activists who could become more militant. But it's exactly those activists who are open to militancy that will likely already support this point. When XR was in its infancy, people were actively trying to position it as the radical flank to Fridays for Future, recognizing that XR itself would need such a flank at some point. There is no dearth of people willing to commit property damage and sabotage in the climate movement, but what's holding them back is not the lack of justification but the lack of a plan for how to do so effectively.