Sorry had to throw this in:
'There is not much wilderness left to destroy, and the nature in the mind is being logged and burned off. Industrial-urban society is not "evil" but there is no progress either ... A gas turbine or an electric motor is a finely-crafted flint knife in the hand. It is useful and full of wonder, but it is not our whole life... I try to hold both history and the wilderness in mind, that my poems may approach the true measure of things and stand against the unbalance and ignorance of our times'
-Gary Snyder quoted in David Kherdian, Six San Francisco Poets, Fresno, Calif., 1969