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John Davison Rockefeller Sr. was an American oil industry business magnate and philanthropist, who is considered to be the wealthiest American of all time by virtually every source, and largely the richest person in modern history. He was born on July 8, 1839 and died on May 23, 1937

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Charles Crocker was an American railroad executive who founded the Central Pacific Railroad, which constructed the westernmost portion of the first transcontinental railroad, and took control with partners of the Southern Pacific Railroad. He was born on September 16, 1822 and died on August 14, 1888

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Jay Cooke was an American financier who helped finance the Union war effort during the American Civil War and the postwar development of railroads in the northwestern United States. He was born on August 10, 1821 and died on February 16, 1905

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William Andrew Clark, Sr. was an American pollination and entrepreneur, involved with mining, banking, and railroads. He was born on January 8th, 1839 and died on March 2nd,

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Andrew Carnegie was a Scottish American industrialist who led the enormous expansion of the American steel industry in the late 19th century. He is often identified as one of the richest people and one of the richest Americans ever