plan the IWW was held in Chicago in 1904. The six attendees were Clarence Smith and Thomas J. Hagerty of the American Labor Union, George Estes and W. L. Hall of the United Brotherhood of Railway Employees, Isaac Cowan of the U.S. branch of the Amalgamated Society of Engineers, and William E. Trautmann of the United Brewery Workmen. Eugene Debs, formerly of the American Railway Union, and Charles O. Sherman of the United Metal Workers were involved but were unable to attend the meeting. The IWW was officially founded in Chicago, Illinois in June 1905. A convention was held of 200 socialists, anarchists, Marxists (primarily members of the Socialist Party of America and Socialist Labor Party of America), and radical trade unionists from all over the United States (mainly the Western Federation of Miners) who strongly opposed the policies of the American Federation of Labor (AFL). The IWW opposed the AFL's acceptance of capitalism and its refusal to include unskilled workers in craft unions. The convention had taken place on June 27, 1905, and was referred to as the "Industrial Congress" or the "Industrial Union Convention". It would later be known as the First Annual Convention of the IWW. The IWW's founders included William D. ("Big Bill") Haywood, James Connolly, Daniel De Leon, Eugene V. Debs, Thomas Hagerty, Lucy Parsons, Mary Harris "Mother" Jones, Frank Bohn, William Trautmann, Vincent Saint John, Ralph Chaplin, and many others. The IWW aimed to promote worker solidarity in the revolutionary struggle to overthrow the employing class; its motto was "an injury to one is an injury to all". They saw this as an improvement upon the Knights of Labor's creed, "an injury to one is the concern of all" which the Knights had spoken out in the 1880s. In particular, the IWW was organized because of the belief among many unionists, socialists, anarchists, Marxists, and radicals that the AFL not only had failed to effectively organize the U.S. working class, but it was causing separation rather than unity within groups of workers by organizing according to narrow craft principles. The Wobblies believed that all workers should organize as a class, a philosophy which is still reflected in the Preamble to the current IWW Constitution: The working class and the employing class have nothing in common. There can be no peace so long as hunger and want are found among millions of the working people