His experiences with the IWW led Moyer to the conclusion that the federation was too radical. Moyer was especially disturbed by the IWW's refusal to ally with or endorse any political party, which had been the key to Moyer's support for the creation of the IWW. In 1908, Moyer led the WFM out of the IWW, taking most of the IWW's membership (which belonged to the WFM) with him. Concerned that the WFM's reputation for radicalism was making it difficult to reach collective bargaining agreements, Moyer re-affiliated his union with the conservative American Federation of Labor (AFL) in 1911.