How do you respond to your encounter with "The Knowledge?" How do you react to the terrifying realization that our biosphere and our future are in grave and imminent danger? Do you retreat into the comfort of denial, hopium, and inactivism, or do you take a stand for the planet and the future? In the popular imagination, activism is usually seen as an inconvenient, difficult, and stressful enterprise. But what if we're wrong about all that? What if there are genuine health benefits that come with engagement? Could activism actually make the human animal stronger? This book offers a positive vision and a path towards meaning and relevance in the face of extreme, almost unbearable circumstances. If your hair is on fire about the state of the planet and you're in need of medicine, this book is for you.