Final answer:
The Labor Movement in the United States began to secure better working conditions and wages for workers facing the challenges of the Industrial Revolution. Labor unions formed as a way of organizing workers to negotiate for their rights, leading to legal reforms that established structured labor laws.
Step-by-step explanation:
The Labor Movement in the United States began principally as a response to the demand for better working conditions and wages. During the Industrial Revolution, the surge in factory jobs and the growth of the urban workforce highlighted the harsh realities of industrial labor. Workers enduring long hours, low pay, and unsafe working environments sought to improve their living and working conditions.
As a result, labor organizations evolved into labor unions, with the aim of protecting workers' rights and interests. Central concerns that drove the labor movement included the push for higher wages, reduced work hours, safer environments, the ending of child labor, health benefits, and support programs for workers.
Moreover, legal reforms later during the Great Depression legalized organized labor and introduced frameworks for collective bargaining and the legal right to strike. Thus, the main reason for the start of the Labor Movement was the collective action taken by workers to challenge and negotiate better terms for their labor.