How did John D. Rockefeller contribute to america?

He was the founder of The Standard Oil Company

he...

Explanation:

John D. Rockefeller (1839-1937), founder of the Standard Oil Company, became one of the world's wealthiest men and a major philanthropist. ... In 1870, he established Standard Oil, which by the early 1880s controlled some 90 percent of U.S. refineries and pipelines.

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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the united states began searching for a way to reduce oil

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