The Gilded Age is a time in the in history of the USA. It lasted from the end of the American Civil War, and up to the late 19th century. The name Gilded Age was first used by writer Mark Twain in The Gilded Age: A Tale of Today (1873). The time saw rapid progress in technology and railroad expansions and industrialization. The Gilded Age nearly doubles America's economy. The Gilded Age were years of unprecedented technological innovation, mass immigration, and intense political partisanship, including disputes over currency, tariffs, political corruption and patronage, and railroads and business trusts.