In this environmental call to action, Laura and Guy Waterman look beyond preserving the ecology of the backcountry to focus on what they call its spiritual dimension--its fragile, untamed wildness. "Without some management, wildness cannot survive the number of people who seek to enjoy it," they write. "But with too much management, or the wrong kind, we can destroy the spiritual component of wildness in our zeal to preserve its physical side." Trailside...