The leading figure in the American labor movement known for his commitment to social justice was Samuel Gompers. As the founder of the American Federation of Labor (AFL), Gompers advocated for workers' rights and better working conditions. Through collective bargaining and strikes, he fought for fair wages, shorter hours, and safe working environments. Gompers emphasized the importance of negotiating with employers rather than resorting to violence, effectively promoting the idea that labor unions could bring about positive change through political action and solidarity among workers.