From humble beginnings to exorbitant wealth: John D. Rockefeller had a shrewd business mind and a zeal for refining oil that transformed his Standard Oil Company into a behemoth. This episode originally aired on Dictators, a Spotify Original from Parcast. Follow Dictators to learn more about the tycoons who wielded the power of tyrants during the Gilded Age.  Learn more about your ad choices. Visit podcastchoices.com/adchoices