ABSTRACT
The major organizations in American society have defined environmentalism and the constituencies that they have represented in their advocacy over the first half of the twentieth century provide important lessons in the history of environmental politics and a window on where environmental politics is going in the future. David Brower dedicated his early career to making it a force in forging environmental policy. During Brower's tenure, the Sierra Club increased its membership more than ten-fold, making its constituency obviously broader and more diverse, as well as more politically active, and taking the first steps, however tentative, toward an expanded environmental presence. Ecoterrorist protect animals, trees, and other natural resources from what they regard as an outrageous assault by industrial and commercial society. They decry the "corporatization" of the major environmental groups who, in their view, have become indistinguishable from their business counterparts and chide them for selling out their principles under the guise of reasonable compromise.
