Daniel Ellsberg (April 7, 1931 – June 16, 2023) was an American political activist, economist, and United States military analyst. While employed by the RAND Corporation, he precipitated a national political controversy in 1971 when he released the Pentagon Papers, a top-secret Pentagon study of U.S. government decision-making in relation to the Vietnam War, to The New York Times, The Washington Post, and other newspapers.