Which businessman is recognized as one of the "Robber Barons" for his impact on steel?

Andrew Carnegie is recognized as one of the "Robber Barons" due to his significant impact on the steel industry during the late 19th century. He founded Carnegie Steel Company, which revolutionized steel production in the United States and contributed to major advancements during the Industrial Revolution. His methods of mass production and vertical integration allowed him to dominate the steel market and significantly lower costs, which facilitated the expansion of railroads, buildings, and infrastructure across the country.

Carnegie's business practices, while innovative and effective in promoting economic growth, also led to criticism regarding labor conditions and his approach toward competition. This terminology of "Robber Baron" often reflects the juxtaposition of economic success with unethical practices in labor relations and monopolistic tendencies. His legacy is complex; while he is also known for his significant philanthropic contributions later in life, it is his role in the steel industry during that era that solidified his image as a key figure among the Robber Barons.

The other figures mentioned, such as John D. Rockefeller, had their significant impacts in different industries and contexts. Rockefeller is primarily associated with the oil industry, William Jennings Bryan with populist political movements, and J.P. Morgan with banking and finance, making Carnegie the most suitable