Mary Harris Jones, commonly known as Mother Jones, was a prominent labor activist born in 1837 in Ireland. She immigrated to the United States in the 1850s and became a key figure in the labor movement, advocating for workers' rights and better working conditions. She was particularly known for her efforts in organizing coal miners and leading strikes. Throughout her life, Mother Jones traveled extensively, speaking out against child labor and promoting the rights of workers. She played a significant role in founding the United Mine Workers and was involved in various labor disputes, earning her a reputation as a fearless champion for the working class.