The world is in a terrible mess. It is toxic, irradiated, and full of injustice. Aiming to stand aside from the mess can produce a seemingly satisfying self-righteousness in the scant moments we achieve it, but since it is ultimately impossible, individual purity will always disappoint. Might it be better to understand complexity and, indeed, our own complicity in much of what we think of as bad, as fundamental to our lives? Against Purity argues that the only answer if we are to have any hope of tackling the past, present, and future of colonialism, disease, pollution, and climate...