<Tr> <Th> Products </Th> <Td> Fuel, lubricant, petrochemicals </Td> </Tr> <Tr> <Th> Number of employees </Th> <Td> 60,000 (1909) </Td> </Tr> <P> Standard Oil Co. Inc. was an American oil producing, transporting, refining, and marketing company . Established in 1870 by John D. Rockefeller and Henry Flagler as a corporation in Ohio, it was the largest oil refinery in the world of its time . Its controversial history as one of the world's first and largest multinational corporations ended in 1911, when the United States Supreme Court ruled that Standard Oil was an illegal monopoly . </P> <P> Standard Oil dominated the oil products market initially through horizontal integration in the refining sector, then, in later years vertical integration; the company was an innovator in the development of the business trust . The Standard Oil trust streamlined production and logistics, lowered costs, and undercut competitors . "Trust - busting" critics accused Standard Oil of using aggressive pricing to destroy competitors and form a monopoly that threatened other businesses . </P>

Who helped bring about the breakup of the standard oil monopoly