What allowed knights of labor to join as members of their union.?

The Knights of Labor allowed a diverse range of workers to join their union, including skilled and unskilled laborers, men and women, as well as workers from various trades and industries. Their inclusive approach was driven by the belief in solidarity among all workers, regardless of their occupation. This openness aimed to unite laborers to advocate for better working conditions, fair wages, and the eight-hour workday, emphasizing collective action to achieve social and economic reform.