Theodore Roosevelt, popularly known as Teddy, was the 26th President of the United States. While famed for his aggressive foreign policy, Roosevelt's conservation efforts helped shape America. During his presidency from 1901 to 1909, Roosevelt signed legislation establishing five national parks and authorized the Antiquities Act which enables the U.S. President to proclaim government lands as National Monuments. As President, Roosevelt created 18 National Monuments. What does all that have to with Yellowstone National Park? Roosevelt's interest in conservation began long before his White House residence. Together with George Bird Grinnell, Roosevelt founded the Boone and Crockett Club in 1887. The club actively promoted the protection of Yellowstone from commercial development. Thanks to the efforts of Roosevelt and Grinnell, President Grover Cleveland signed a bill protecting Yellowstone in 1894.