choice", "democracy", and "economy". COMEXI – The Mexican Council of International Affairs (Consejo Mexicano de Asuntos Internacionales). United States As the classification is most often used today, the oldest American think tank is the Carnegie Endowment for International Peace, founded in 1910. The Institute for Government Research, which later merged with two organizations to form the Brookings Institution, was formed in 1916. Other early twentieth century organizations now classified as think tanks include the Hoover Institution (1919), The Twentieth Century Fund (1919, and now known as the Century Foundation), the National Bureau of Economic Research (1920), the Council on Foreign Relations (1921), and the Social Science Research Council (1923). The Great Depression and its aftermath spawned several economic policy organizations, such as the National Planning Association (1934), the Tax Foundation (1937), and the Committee for Economic Development (1943). In collaboration with the Douglas Aircraft Company, the Air Force set up the RAND Corporation in 1946 to develop weapons technology and strategic defense analysis. The Hudson Institute is a conservative American think tank founded in 1961 by futurist, military strategist, and systems theorist Herman Kahn and his colleagues at the RAND Corporation. Recent members include Mike Pompeo, the former secretary of state under Donald Trump who joined in 2021. More recently, progressive and liberal think tanks have been established, most notably the Center for American Progress and the Center for Research on Educational Access and Leadership (CREAL). The organization has close ties to former United States President Barack Obama and other prominent Democrats. Think tanks help shape both foreign and domestic policy. They receive funding from private donors, and members of private organizations. By 2013, the largest 21 think tanks in the US spent more than US$1 billion per year. Think tanks may feel more free to propose and debate controversial ideas than people within government. The progressive media watchdog Fairness and Accuracy in Reporting (FAIR) has identified the top 25 think tanks by media citations, noting that from 2006 to 2007 the number of citations declined 17%. The FAIR report reveals the ideological breakdown of the citations: 37% conservative, 47% centrist, and 16% liberal. Their data show that the most-cited think tank was the Brookings Institution, followed by the Council on Foreign Relations, the American Enterprise Institute, The Heritage Foundation, and the Center for Strategic and International Studies. In 2016, in response to scrutiny about think tanks appearing to have