By examining the nineteenth-century world in which the four men livedits society, economy, politics, and cultureDorman sheds light on the roots of American environmentalism. He provides an overview of the early decades of both resource conservation and wilderness preservation, discussing how Marsh, Thoreau, Muir, and Powell helped define the issues that began changing the nation's attitudes toward its environment by the early twentieth century. Dorman's readings of works including Marsh's Man and Nature, Thoreau's The Maine Woods, Muir's The Mountains of California, and Powell's Report on the Lands of the Arid Region reveal their authors' influence on environmental thought and politics even up to the present day.







