The dramatic desert landscapes of the Big Bend country along the Texas-Mexico border reminded historian Walter Prescott Webb of an earth-wreck in which a great section of country was shaken down, turned over, blown up, and set on fire. By contrast, naturalist Aldo Leopold considered the region a mountainous paradise in which even the wild Mexican parrots had no greater concern than whether this new day which creeps slowly over the canyons is bluer...