To me, a wilderness is where the flow of wildness is essentially uninterrupted by technology; without wilderness the world is a cage. -- David Brower (American environmentalist and mountaineer, founder of the Sierra Club)
The term “wilderness” refers to environments that have not been extensively altered by human activity. Preserves, estates, farms, conservation preserves, ranches, national forests, national parks, and even urban areas beside rivers, gulches, or otherwise undeveloped areas are examples of wilderness areas. For the survival of specific species, ecological study, protection, and isolation, wilderness regions and protected parks are important. Certain nature writers believe that wilderness regions are essential for the human soul and creativity, and some ecologists believe that wilderness areas are a necessary component of the Earth’s self-sustaining natural ecology (the biosphere). They could also help to maintain past genetic features and provide habitat for wild flora and wildlife that would be difficult or impossible to replicate in zoos, arboretums, or laboratories.