The Gilded Age was defined by unrestrained, unregulated growth and accumulation of wealth by America's capitalist class, colloquially known as the robber barons. Discuss the significance of the Triangle Shirtwaist Fire as a pivotal moment in the shift from the Gilded Age to the era of reform known as the Progressive Era. What were the goals of progressive reformers, and how did the fire serve as a catalyst for political, cultural, and economic change?