Mary led the 1910 chainmakers’ strike, securing the first minimum wage for workers.
The year 1910 saw Mary Macarthur lead the Cradley Heath women chainmakers in a monumental ten-week strike, resulting in Britain's first legally enforced minimum wage for this group of workers. Her strategic leadership in this strike not only secured fair wages for some of Britain's most exploited female laborers but also spotlighted the injustices of sweated labor conditions. The success of the chainmakers' strike catalyzed changes in labor laws, serving as a model for future labor reforms and elevating Macarthur's status as a pioneering leader in women's labor rights advocacy. This victory demonstrated the power of organized labor and heightened awareness about gender inequalities in the workplace.