Robber Barons: Robber barons were wealthy industrialists during the Gilded Age who amassed great fortunes through unethical business practices such as monopolies or exploiting workers.
Populism: Populism emerged during this era as a movement advocating for greater rights and representation for farmers and laborers against powerful elites.
Progressive Era: Following the Gilded Age, the Progressive Era was marked by reform efforts aimed at addressing social issues such as child labor, women's suffrage, trust-busting (breaking up monopolies), and improving working conditions.