| Rockefeller began to monopolize in the 1870s. |
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| Rockefeller began to dominate the Oil Industry and in 1870 he formed his own standard Oil Company. In Ohio. |
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| Rockefeller came to control the oil industry through a combination of hard work, efficiency, foresight, and ruthless business practices. |
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 | Man, that was some hard work! But I'm glad I was successful with it! | |
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