Which notable figure is known for advocating for improved conditions for miners?

Mother Jones is recognized as a prominent figure who advocated vigorously for improved working conditions for miners. Her activism began in the late 19th and early 20th centuries, a time when many miners faced hazardous working environments, low wages, and long hours. She became famous for organizing strikes and protests, often putting herself in the heart of labor disputes to rally workers for their rights.

Mother Jones's efforts were particularly notable during significant events such as the Coal Wars in West Virginia and the Ludlow Massacre, where she fought for the rights of coal miners and their families. Her steadfast dedication to labor rights made her a national figure, and she worked tirelessly to help organize workers into unions, emphasizing the need for collective bargaining to improve their working conditions.

The other figures listed also had significant impacts in various social and labor rights movements, but their primary focus was not specifically on mining conditions. For example, Clara Lemlich was a labor activist known for her role in garment workers' rights; Frances Perkins became the first female U.S. Secretary of Labor and worked on broader labor reforms; and Sadie Tanner Mossell Alexander was a civil rights activist and the first African American woman to earn a law degree in the United States, focusing on social justice issues