In contrast, environmentalist John Muir promulgated a very different view of conservation, rejecting the efficiency motivation. Muir instead preached that nature was sacred and humans are intruders who should look but not develop. Working through the Sierra Club he founded, Muir tried to minimize commercial use of water resources and forests. While Muir wanted nature preserved for the sake of pure beauty, Roosevelt subscribed to Pinchot's formulation, "to make the forest produce the largest amount of whatever crop or service will be most useful, and keep on producing it for generation after generation of men and trees."