Phillip D. Armour was the first businessman to introduce the refrigerated railroad car. It was for transporting meat. The answer would be "meat packing".
Vanderbilt mainly controlled railroads, southern railroads in particular. His fortune started during the Industrial Revolution and it has been controlled by his family ever since.
499
i am not sure but i think it is england
Andrew Carnegie
Andrew Carnegie, a prominent industrialist in the late 19th century, controlled and developed all aspects of the steel business through his company, Carnegie Steel Company. Carnegie revolutionized the steel industry through vertical integration, owning and controlling the entire production process from raw materials to distribution. This consolidation of resources allowed him to dominate the industry and amass a significant fortune.
andrew carnegie
Andrew Carnegie was not a religious man per se, however, he did attend a Presbyterian Church for many years. Carnegie was an industrialist who made his fortune in the steel industry.
cornelius vannderbilt
John D Rockefeller
Oil
real estate
Newspapers and media is where he made his fortune.
John D. Rockefeller, who made his fortune in the oil industry. With the rise of his company Standard Oil.
Levi Strauss.
it made it so that everyone would have a equal change to get money.
After the Civil War he owned the largest iron and steel works in America.