Answer:
Business leaders such as Andrew Carnegie and others referred to as "robber barons" contributed to the development of an industrialized and capitalist American society.
Step-by-step explanation:
Industrialists and business magnates such as Andrew Carnegie (Scottish-American) and Cornelius Vanderbilt (American) were often considered "robbers" due to their unscrupulous business practices, which included employee abuse, stock market manipulation or competition elimination. However, the view towards these men changed during the 19th century. They started to be seen as necessary revolutionary entrepreneurs who were improving the American society by leading the steel industry (Carnegie) and the transcontinental railroads and shipping (Vanderbilt). These contributions were of great value to the development of capitalism in the American society.