John D. Rockefeller

Rockefeller was born on July 8, 1839, in central New York as the second of six children. He showed early business acumen and entrepreneurial drive that would define his career. In 1859, the world's first oil strike occurred near Titusville, Pennsylvania, creating a new industrial frontier. Recognizing the opportunity, Rockefeller and partners began refining oil in Cleveland, Ohio, in 1863. From the outset, Rockefeller employed aggressive business tactics to gain competitive advantage. By 1870, he incorporated the Standard Oil Company of Ohio with himself as president. The company quickly prospered and began acquiring competitors. Within just over a decade, Standard Oil had achieved a near-monopoly of the U.S. oil business. To circumvent state laws preventing out-of-state ownership, Rockefeller's lawyers created the Standard Oil Trust in 1882—the first major corporate trust in American history. This innovation became the template for modern corporations. In 1911, the U.S. Supreme Court ruled Standard Oil an illegal monopoly and ordered it broken into 34 separate companies. At his peak in 1913, Rockefeller's wealth reached $900 million in nominal terms, equivalent to approximately $400 billion adjusted for inflation. In his later years, Rockefeller pivoted toward large-scale philanthropy, establishing major institutions like the Rockefeller Institute for Medical Research, the General Education Board, and the Rockefeller Foundation.