Wilderness is a resource which can shrink but not grow. Invasions can be arrested or modified in a manner to keep an area usable either for recreation, science or for wildlife, but the creation of new wilderness in the full sense of the word is impossible. It follows, then, that any wilderness program is a rearguard action, through which retreats are reduced to a minimum.
Aldo LeopoldOur grandfathers were less well-housed, well-fed, well-clothed than we are. The strivings by which they bettered their lot are also those which deprived us of [Passenger] pigeons. Perhaps we now grieve because we are not sure, in our hearts, that we have gained by the exchange. The gadgets of industry bring us more comforts than the pigeons did, but do they add as much to the glory of the spring?
Aldo LeopoldThird, there is value in any experience that exercises those ethical restraints collectively called 'sportsmanship'. Our tools for the pursuit of wildlife improve faster than we do, and sportsmanship is the voluntary limitation in the use of these armaments. It is aimed to augment the role of skill and shrink the role of Gadgets in the pursuit of wild things.
Aldo LeopoldAll ethics so far evolved rest upon a single premise: that the individual is a member of a community of interdependent parts.
Aldo LeopoldWilderness is the raw material out of which man has hammered the artifact called civilization. Wilderness was never a homogenous raw material. It was very diverse. The differences in the product are known as cultures. The rich diversity of the worlds cultures reflects a corresponding diversity. In the wilds that gave them birth.
Aldo Leopold