The Progressive Era was marked by significant social activism and political reform in the United States, focusing on improving working conditions, regulating big businesses, and addressing economic disparities. Key events included the tragic Triangle Shirtwaist Factory fire, which underscored unsafe labor conditions, and the establishment of legislation such as the Meat Inspection Act. Despite some advancements, the era also revealed limitations in reforms, particularly regarding rights for women and African Americans, and often left many social issues unresolved.