Protecting wild animals and preserving the environment are two ideals so seemingly compatible as to be almost inseparable. But in fact, between animal welfare and conservation science there exists a space of underexamined and unresolved tension: wildness itself. Transporting readers into the field with scientists tackling these profound challenges, Emma Marris tells the affecting and inspiring stories of animals around the globe. And she offers a companionable tour of the philosophical ideas that may steer our search for sustainability and justice in the non-human world.