There is nothing in which the birds differ more from man than the way in which they can build and yet leave a landscape as it was before. – Robert Lynd, The Blue Lion and Other Essays

Racial injustice, war, urban blight, and environmental rape have a common denominator in our exploitative economic system. – Channing E. Phillips, speech, Washington, D.C., 22 April 1970

We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect. – Aldo Leopold, A Sand County Almanac

To waste, to destroy our natural resources, to skin and exhaust the land instead of using it so as to increase its usefulness, will result in undermining in the days of our children the very prosperity which we ought by right to hand down to them amplified and developed. – Theodore Roosevelt, seventh annual message, 3 December 1907