"The Robber Barons" is a seminal work by Matthew Josephson, originally published in 1934. It provides a detailed and critical examination of the influential industrialists and financiers of the late 19th and early 20th centuries in the United States, often referred to as the "Robber Barons." Josephson delves into the lives and business practices of figures such as John D. Rockefeller, Andrew Carnegie, J.P. Morgan, Cornelius Vanderbilt, and others, exploring their rise to power, consolidation of wealth, and their impact on American society and economy.