The document covers the period of rapid industrialization and urbanization in the United States between 1865 and the end of the nineteenth century, highlighting key figures such as Cornelius Vanderbilt, John D. Rockefeller, and Andrew Carnegie. It describes the wealth accumulation of the 'nouveau riche' during the Gilded Age, alongside societal critiques and the myth of the 'self-made man' popularized by authors like Horatio Alger. Additionally, it explores the implications of their wealth and philanthropy, with Carnegie notably advocating for a 'gospel of wealth' that emphasized charitable responsibility.