Acclaimed science journalist Michelle Nijhuis traces the history of the movement to protect and conserve other forms of life. From early battles to save charismatic species such as the American bison and bald eagle to today's global effort to defend life on a larger scale, Nijhuis's "spirited and engaging" account documents "the changes of heart that changed history" (Dan Cryer, Boston Globe).With "urgency, passion, and wit" (Michael Berry, Christian Science Monitor), she describes the vital role of scientists and activists such as Aldo Leopold and Rachel Carson, reveals the origins of vital organizations like the Audubon Society and the World Wildlife Fund, explores current efforts to protect species such as the whooping crane and the black rhinoceros, and confronts the darker side of modern conservation, long shadowed by racism and colonialism.