The rise of the labor movement in the United States was significantly driven by the economic hardships faced during the Industrial Revolution, particularly in the late 19th and early 20th centuries. Poor working conditions, long hours, and low wages led to a growing discontent among workers. Incidents such as the Haymarket Affair in 1886, along with other strikes and labor disputes, galvanized workers to organize for better rights and protections. Labor unions emerged to advocate for collective bargaining, improved conditions, and fair wages, ultimately playing a crucial role in shaping labor laws and workers' rights in the U.S.