To conserve habitat in terrestrial ecoregions and stop deforestation is a goal widely shared by many groups with a wide variety of motivations. These issues and groups are covered in their own articles.

To protect sea life from extinction due to overfishing is another commonly stated goal of conservation — ensuring that “some will be available for our children” to continue a way of life.

The consumer conservation ethic is sometimes expressed by the four R’s: ” Rethink, Reduce, Reuse, Recycle,” This social ethic primarily relates to local purchasing, moral purchasing, the sustained, and efficient use of renewable resources, the moderation of destructive use of finite resources, and the prevention of harm to common resources such as air and waterquality, the natural functions of a living earth, and cultural values in a built environment.

The principal value underlying most expressions of the conservation ethic is that the natural world has intrinsic and intangible worth along with utilitarian value — a view carried forward by the scientific conservation movement and some of the olderRomantic schools of ecology movement.

More Utilitarian schools of conservation seek a proper valuation of local and global impacts of human activity upon nature in their effect upon human well being, now and to our posterity. How such values are assessed and exchanged among people determines the social, political, and personal restraints and imperatives by which conservation is practiced. This is a view common in the modern environmental movement.

These movements have diverged but they have deep and common roots in the conservation movement.

In the United States of America, the year 1864 saw the publication of two books which laid the foundation for Romantic and Utilitarian conservation traditions in America. The posthumous publication of Henry David Thoreau’s Walden established the grandeur of unspoiled nature as a citadel to nourish the spirit of man. From George Perkins Marsha very different book, Man and Nature, later subtitled “The Earth as Modified by Human Action”, catalogued his observations of man exhausting and altering the land from which his sustenance derives.

From Wikipedia