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After months of looking for a job, he finally got a job as an assistant bookkeeper for Hewitt & Tuttle.
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He and his friend Maurice Clark started a company that sold hay and grain. http://www.freeinfosociety.com/article.php?id=64
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He made this company very efficient by making the business manufacture almost all the supplies it needed.
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He bought out the shares owned by the Clark brothers for $72500. He also brought in his brother William to help him expand the business by creating more refineries.
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Along with Rockefeller, Andrews & Flagler Co. being the largest refiner in the world, it also was highly efficient.
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John held the majority share in the company. They also began buying out other companies to make Standard Oil a huge corporation.
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90% of the refining in the US was done by Standard Oil.
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He donated this money to the University of Chicago, founded the Rockefeller Foundation for education, founded the Rockefeller Institute for medical research, and founded the Rockefeller Sanitary Commission.
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He is now known as one of the most successful businessmen in history
