The Cato Institute is an American libertarian think tank headquartered in Washington, D.C. It was founded in 1977 by Ed Crane, Murray Rothbard, and Charles Koch, chairman of the board and chief executive officer of Koch Industries. Cato was established to have a focus on public advocacy, media exposure and societal influence. According to the 2020 Global Go To Think Tank Index Report (Think Tanks and Civil Societies Program, University of Pennsylvania), Cato is number 27 in the "Top Think Tanks Worldwide" and number 13 in the "Top Think Tanks in the United States".