1The poet's wilderness years, spent wandering in the American West, profoundly influenced his later work.
2Does the concept of wilderness necessarily imply a dichotomy between nature and culture, or can they be reconciled?
3Conservation efforts have focused on preserving the last remaining wilderness areas, untouched by human development.
4In the wilderness of the human heart, one may discover both the darkest fears and the most profound sources of hope.
5There is a long tradition of wilderness literature, from Thoreau's Walden to contemporary nature writing, that explores the human relationship with the natural world.