Towards 1860, at the early age of 20, Rockefeller, realizing the high profits of vertical integration of refining and distributing oil, rather than on oil exploration in itself, carefully analyzed places to minimize costs of distributing and refining it. Its success was unrivaled. Just to get a glimpse of how rich he became, according to Wikipedia, he managed to gain a net worth equivalent to modern 23.6 billion US dollars. Yet, “using the inflation model, in adjusted dollars for late 2017, his net worth would be US$350 billion”. Also “On September 29, 1916, Rockefeller became the first person ever to reach a nominal personal fortune of US$1 billion (equivalent to US\$16 billion in 2019)”1.