The John Birch Society was founded in 1958 by Robert H. Welch, Jr., a retired candymaker, to combat communism and promote ultraconservative causes in the US. It was named for an American missionary and army intelligence officer killed by Chinese communists in 1945, considered by the society the first hero of the Cold War. Its membership reached more than 70,000 in the 1960s. Since then, it has promoted many objectives, including pressing for the US to withdraw from what organization? Discuss