The idea of Wilderness

We just love this video. Just as beautiful as the places which have been preserved, is the idea which ultimately became law.

"In order to ensure that... Expanding Settlement, and Growing Mechanization does not occupy and modify all areas within the United States, for this purpose there is established Wilderness Areas... where man himself is a visitor who does not remain, where the land retains its primeval character and influence."
                                         -Wilderness Act of 1964

What do you think. Is the primeval character of the land worth protecting?