The key-log which must be moved to release the evolutionary process for an ethic is simply this: quit thinking about decent land-use as solely an economic problem. Examine each question in terms of what is ethically and esthetically right, as well as what is economically expedient. A thing is ight when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong when it tends otherwise.

— A Sand County Almanac by Aldo Leopold (Page 224)