The Gilded Age, spanning from the 1870s to the 1890s, saw rapid industrialization and economic growth alongside political corruption. This era of stark contrasts laid the groundwork for the Progressive Era, which sought to address social, political, and economic issues through reform. The Progressive Era, lasting from the 1890s to the 1920s, brought significant changes to American society. Key developments included antitrust legislation, women's suffrage, and increased government regulation, shaping modern American capitalism, politics, and social structures.