Till now man has been up against Nature; from now on he will be up against his own nature. – Dennis Gabor, Inventing the Future, 1964

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

If civilization has risen from the Stone Age, it can rise again from the Wastepaper Age. – Jacques Barzun, The House of Intellect, 1959

Zoos are becoming facsimiles – or perhaps caricatures – of how animals once were in their natural habitat. If the right policies toward nature were pursued, we would need no zoos at all. – Michael Fox, Sierra, November-December 1990