The document discusses the terms "robber baron" and "captain of industry" as they relate to prominent American businessmen in the Gilded Age. It notes that while robber baron was a negative term used by citizens to describe businessmen who made their fortunes through questionable means, some argue these men were actually "captains of industry" who intended to ethically acquire wealth to support the country. It then examines John D. Rockefeller and his use of horizontal integration through Standard Oil, as well as Andrew Carnegie's use of vertical integration in the steel industry, to discuss whether these men were truly robber barons or captains of industry.