"Robber Barons" is a term used to describe wealthy and powerful industrialists in the late 19th century in the United States. These individuals, such as John D. Rockefeller and Andrew Carnegie, amassed great fortunes through monopolistic practices and often exploited workers. Their businesses dominated key industries like oil and steel, leading to significant economic growth but also social inequality. Critics argued that the methods used by these magnates were unethical, as they often engaged in practices like price-fixing and labor exploitation. While they contributed to the development of the American economy, their legacy is mixed, with ongoing debates about their impact on society and the economy.