As we celebrate a landmark year for these great American proving grounds, it is well to look thoughtfully behind so that we may see more clearly ahead.
Imagine what the United States would be like without its great forests, without the tree-covered expanses of the Appalachians, the Sierra Nevada, the Cascades, and the Rocky Mountains. More than a century ago, a small but influential group of American artists, writers, scientists, and intellectuals found reason to fear that very ...