Unsportsmanlike predator-killing is always rationalized as defence of property—usually someone else’s property. This excuse is getting too thin to pass muster among thinking conservationists.

By and large, our present problem is one of attitudes and implements. We are remodeling the Alhambra with a steam-shovel, and we are proud of our yardage. We shall hardly relinquish the shovel, which after all has many good points, but we are in need of gentler and more objective criteria for its successful use

The evolution of a land ethic is an intellectual as well as emotional process.

Examine each question in terms of what is ethically and aesthetically right, as well as what is economically expedient. A thing is right when it tends to perserve the integrity, stability, and beauty of the biotic community. It is wrong when it tends otherwise.