Who started Standard Oil and dominated the oil industry in the Gilded Age?

Standard Oil was founded by John D. Rockefeller in 1870. He dominated the oil industry during the Gilded Age through aggressive business practices, including horizontal integration and forming trusts, which allowed him to control a significant share of the oil market. Rockefeller's strategies not only made him one of the wealthiest individuals of his time but also led to widespread public outcry and regulatory reforms in the American economy.