I have to disagree with you there. Humans are just as naturally occuring as anything else. We need to be responsibile for our actions, we need to do a good job of stewarding the wild, but we aren't some invader species that has somehow "infected" the earth. If we were an infection, the the cure would be of course to eliminate the infection. I trust you'll be the first to volunteer?

Responsibility and diligence in the wild? Yes. A guest? Certainly not. John Muir said it well, "people are beginning to find out that going to the mountains is going home; that wildness is a necessity; and that mountain parks and reservations are useful not only as fountains of timber and irrigating rivers, but as fountains of life."