prevalent term. During autumn of 1931, the "Manifesto of the 30" was published by militants of the anarchist trade union CNT and among those who signed it there was the CNT General Secretary (1922–1923) Joan Peiro, Ángel Pestaña CNT (General Secretary in 1929) and Juan Lopez Sanchez. They were called treintismo and they were calling for libertarian possibilism which advocated achieving libertarian socialist ends with participation inside structures of contemporary parliamentary democracy. In 1932, they establish the Syndicalist Party which participates in the 1936 Spanish general elections and proceed to be a part of the leftist coalition of parties known as the Popular Front obtaining two congressmen (Pestaña and Benito Pabon). In 1938, Horacio Prieto, general secretary of the CNT, proposes that the Iberian Anarchist Federation transforms itself into the Libertarian Socialist Party and that it participates in the national elections. The Manifesto of Libertarian Communism was written in 1953 by Georges Fontenis for the Federation Communiste Libertaire of France. It is one of the key texts of the anarchist-communist current known as platformism. In 1968, the International of Anarchist Federations was founded during an international anarchist conference in Carrara, Italy to advance libertarian solidarity. It wanted to form "a strong and organized workers movement, agreeing with the libertarian ideas".Short history of the IAF-IFA A-infos news project, Accessed 19 January 2010. In the United States, the Libertarian League was founded in New York City in 1954 as a left-libertarian political organization building on the Libertarian Book Club.Anarchist Voices: An Oral History of Anarchism in America by Paul Avrich. AK Press. 2005. pp. 471–472. Members included Sam Dolgoff, Russell Blackwell, Dave Van Ronk, Enrico Arrigoni and Murray Bookchin. In Australia, the Sydney Push was a predominantly left-wing intellectual subculture in Sydney from the late 1940s to the early 1970s which became associated with the label Sydney libertarianism. Well known associates of the Push include Jim Baker, John Flaus, Harry Hooton, Margaret Fink, Sasha Soldatow, Lex Banning, Eva Cox, Richard Appleton, Paddy McGuinness, David Makinson, Germaine Greer, Clive James, Robert Hughes, Frank Moorhouse and Lillian Roxon. Amongst the key intellectual figures in Push debates were philosophers David J. Ivison, George Molnar, Roelof Smilde, Darcy Waters and Jim Baker, as recorded in Baker's memoir Sydney Libertarians and the Push, published in the libertarian Broadsheet in 1975. An understanding of libertarian values and social theory can be obtained from their publications, a few of