Who is john D rock feller and how did he operate his business?

John D. Rockefeller was an American industrialist and philanthropist, best known as the co-founder of the Standard Oil Company, which dominated the oil industry in the late 19th and early 20th centuries. He operated his business using strategies such as horizontal and vertical integration, which allowed him to control every aspect of oil production and distribution, significantly reducing costs and increasing efficiency. Rockefeller’s aggressive tactics, including undercutting competitors and securing favorable railroad shipping rates, helped him establish a near-monopoly in the oil market. His business practices eventually led to the U.S. government breaking up Standard Oil in 1911 due to antitrust concerns.