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Irish-born American labor organizer Mother Jones (Mary Harris Jones) (1830 - 1930) walks down a staircase, helped by an unidentified man, early 1900s. (Photo by FPG/Getty Images)

Irish-born American labor organizer Mother Jones (Mary Harris Jones) (1830 - 1930) walks down a staircase, helped by an unidentified man, early 1900s. (Photo by FPG/Getty Images)

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Labor organizer, Mary Harris Jones, sitting in a room, Chicago, Illinois, October 26, 1915. (Photo by Chicago Sun-Times/Chicago Daily News collection/Chicago History Museum/Getty Images)

Labor organizer, Mary Harris Jones, sitting in a room, Chicago, Illinois, October 26, 1915. (Photo by Chicago Sun-Times/Chicago Daily News collection/Chicago History Museum/Getty Images)

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Irish-born American labor organizer Mother Jones (Mary Harris Jones) (1830 - 1930) poses with a five-tiered cake in celebration of her 100th birthday, May 1, 1930. (Photo by FPG/Getty Images)

Irish-born American labor organizer Mother Jones (Mary Harris Jones) (1830 - 1930) poses with a five-tiered cake in celebration of her 100th birthday, May 1, 1930. (Photo by FPG/Getty Images)