Tarbell's *History* changed the way the country saw Rockefeller. She punctured his myth of brilliance and competence, and showed how he owed his fortune to swindling and cheating. She cut him down to size. She was a key figure in the American trustbusting movement, a catalyst for the revolution that saw Rockefeller and his fellow oligarchs overthrown.
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This took a *hell* of a long time. The Sherman Act (which was used to break up Standard Oil) was passed in 1890, but Standard Oil wasn't broken up until *1912*. It took perseverance through setback after setback, it took the compounding tragedies that drove people to question the order and demand change, and it took unglamorous organizing and dramatic street-fights to escape from oligarchy's powerful gravity well.
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