Before the 1940s, the CNT was the major force in Spanish working class politics, attracting 1.58 million members at one point and playing a major role in the Spanish Civil War.[99] The CNT was affiliated with the International Workers Association, a federation of anarcho-syndicalist trade unions founded in 1922, with delegates representing two million workers from 15 countries in Europe and Latin America. In Latin America in particular, "[t]he anarchists quickly became active in organising craft and industrial workers throughout South and Central America, and until the early 1920s most of the trade unions in Mexico, Brazil, Peru, Chile, and Argentina were anarcho-syndicalist in general outlook; the prestige of the Spanish C.N.T. as a revolutionary organisation was undoubtedly to a great extent responsible for this situation.