As the Anthropocene advances, people across the red-green political spectrum seek to understand and halt our deepening ecological crisis. Environmentalists, scientists, and ecosocialists share concerns about the misuse of natural resources, but often differ on explanations and solutions. Some blame environmental disasters on overpopulation. Others wonder if Darwin’s evolutionary theories disprove Marx’s revolutionary views, or if capitalist history contradicts Anthropocene science. Some ask if all this worry about climate change and the ecosystem might lead to a “catastrophism” that weakens efforts to heal the planet. Ian Angus responds to these concerns in A Redder Shade of Green, with a fresh, insightful clarity, bringing socialist values to science, and scientific rigor to socialism.