was the first Director of the Federal Bureau of Investigation (FBI) of the United States. He founded the present form of the agency, and remained director for 48 years until his death. During his life, Hoover was highly regarded by much of the U.S. public. Hoover's leadership spanned eight presidential administrations, encompassed Prohibition, the Great Depression, World War II, the Korean War, the Cold War, and the Vietnam War. During this time, the United States moved from being a rural nation with strong isolationist tendencies to an urbanized superpower.