Answer: I think the Gilded Age and the Progressive Era change our country after Reconstruction by having the increase of production of iron and steel rising dramatically in the western as well like lumber, gold. The Progressive brought a lot urbanization to America demanding jobs and expansion to the west. Industrialization as well was a big factor for those who migrated providing jobs. Those who left west were granted land if they were able to maintain the land. Political machines as well to stop corruption that was lead from the Gilded Age with the monopolies and steel factories.