The document summarizes the history of wildlife conservation in the United States from the 1600s to present day. It outlines key events like the establishment of Yellowstone National Park in 1872 as the first national park, and the passage of laws like the Lacey Act of 1900, Migratory Bird Acts of the 1920s-30s, and Endangered Species Act of 1973 to regulate wildlife protection. It also profiles important historical figures in the conservation movement such as Theodore Roosevelt, John Muir, Aldo Leopold, and Jay Darling.