In Theodore Roosevelt's speech at Grand Canyon I think the intended audience is people who have a feeling and touch with nature but who just needed a little more inspiration to get out there and do something. His intention of the speech was to draw attention to the way of the Indians way of life and how they used every resource they could. We tend to waste a lot of garbage and don't give a shit what we throw away or recycle. Roosevelt saw this a long time ago and felt it needed to be brought to everyones attention.