Who was Andrew Carnegie and what was the importance of standard oil?

Andrew Carnegie was a prominent industrialist and steel magnate in the late 19th century, known for his philanthropy and contributions to libraries and education. Standard Oil was an American oil producing, transporting, refining, and marketing company founded by John D. Rockefeller in 1870. It played a major role in the development of the oil industry in the United States, becoming one of the first and largest multinational corporations.