Upton Sinclair was a muckraking author whose influential works exposed industrial and socio-political injustices.
Eugene V. Debs was a prominent American labor leader, socialist, and five-time presidential candidate, advocating for workers' rights and social justice.
Samuel Gompers was an American labor leader instrumental in founding the American Federation of Labor, advocating for workers' rights and better working conditions.
Walter Reuther was an iconic American labor leader, founding the United Automobile Workers and becoming a key figure in the Civil Rights Movement.