Prior to the 1930s, only the AFL, organized in craft unions, represented a significant organization, though it represented only a small minority of the working class and pursued conservative policies. Industrial unions, organizing workers in mass production industries, such as auto, steel, rubber, electrical, aviation, etc., were created only in the 1930s, by the CIO, under state sponsorship, as part of the New Deal run-up to World War II, for which they were needed to assure a reliable, disciplined workforce.