Which labor organization was originally established by both skilled and unskilled workers, including many immigrants?

The Knights of Labor was a significant labor organization established in the late 19th century that sought to include a broad spectrum of workers, both skilled and unskilled, in its membership. This inclusivity was crucial as it aimed to unite all workers, regardless of their skill level or background, including a substantial number of immigrants who were often marginalized in the workforce. The organization's philosophy centered on promoting labor rights and advocating for better working conditions, shorter work hours, and the establishment of cooperatives. This broad coalition was a defining characteristic of the Knights of Labor, distinguishing it from later labor organizations that became more focused on skilled laborers, such as the American Federation of Labor, which primarily represented skilled workers and did not extend its membership as extensively to unskilled workers or immigrants. The Knights of Labor's commitment to inclusivity reflects the diverse workforce of the time and its aim to bring about social reforms through collective action.