From Bowyer's Teddy Roosevelt vs. the Noisy Environmentalists at TCS, one quote:
TR and his Director of Forestry Services, Gifford Pinchot created a system of 'wildlife Reserves'. They argued that it would not be fair for one generation to do all the logging and all the digging and to leave nothing behind for future generations. They didn't think of these reserves as something pristine, which would be rendered somehow ceremonially unclean by the signs of human development. They just wanted to share natural resources and beauty with future generations, like ours. In fact the shift in language from 'resources' to 'the environment' signals the shift in world-view from conservation to preservation. A resource, by its very nature, is to be used, sparingly, perhaps, but nonetheless, used.
This is why the Roosevelt-Pinchot philosophy is known to historians as the 'wise-use' movement. It's why the administration's forestry handbook contained explicit instructions for how to extract lumber and minerals from the protected lands. That's why the memorial lauds 'development', which contemporary environmentalists forbid in places like ANWR.
The preservationists of the time, like Sierra Club founder, John Muir, fought against them. While Roosevelt/Pinchot sought to make nature useful to humanity, by opening it to efficient use, and protecting it from destruction, Muir claimed that nature was to be useful to nature itself, not to man. For Roosevelt earth is for us, for people. For Muir man and land were equals. It wasn't the conservationist Roosevelt who put ANWR's oil out of our reach, but the environmentalist Carter.