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The Rockefellers

A Dynasty Built On Oil

John D. Rockefeller came from humble beginnings, but that changed in the 1880s when he took a risk in the oil business and became the founder of Standard Oil Corporation. That risk lead to the multi-billion-dollar fortune that allowed generations of Rockefellers to make a huge difference in America as philanthropists, realtors and politicians.

What was the greatest gamble of John D. Rockefeller Jr's career?

  • Biography on CNBC â?? The Rockefellers  Thursday, 14 Jan 2010 | 12:00 AM ET

    It was in Cleveland, Ohio where John D. Rockefeller, Sr., amassed his great fortune through the Standard Oil Company, which controlled 90% of the world's oil refineries by 1880.