Climate change is already affecting millions of people. Governments talk about taking action to limit global warming to 2°C above preindustrial levels, but the greenhouse gas emissions allowed by their policies have the Earth on track to far exceed that by the end of the century—a truly disastrous path. Visionary plans abound for how to slash emissions and improve society at the same, including various Green New Deals, but how can we make these urgently needed changes? ‘Future on Fire’ argues that a just transition from fossil fuels and other drivers of climate change will not be delivered by businesspeople or politicians who support the status quo. Electing green left leaders will not be enough to overcome opposition from capitalists and state bureaucrats. Only the power of disruptive mass social movements has the potential to pressure governments to change, so supporters of climate justice should commit to building them. Confronting the question “What if warming above 2° becomes unavoidable?” and refusing to despair, David Camfield argues that even a ravaged planet is worth fighting for—and that ultimately the only solution to the ecological crisis created by capitalism is a transition to ecosocialism.