Book excerpt: Over the past two decades, a select group of small but highly effective grassroots organizations have achieved remarkable success in protecting endangered species and forests in the United States. The Rebirth of Environmentalism tells for the first time the story of these grassroots biodiversity groups. Filled with inspiring stories of activists, groups, and campaigns that most readers will not have encountered before, The Rebirth of Environmentalism explores how grassroots biodiversity groups have had such a big impact despite their scant resources, and presents valuable lessons that can help the environmental movement as a whole—as well as other social movements—become more effective.