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One of the four principal investors that formed the Central Pacific Railroad. With the money Hopkins had earned throughout his career he built his own ornate mansion. Hopkins later on died of natural causes.

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Gould was a leading American railroad developer and speculator. Also one of the most ruthless robber barons of the Gilded Age. He also partnered with James Fisk to  gain control over the Railroad. This led to Gould becoming one of the richest in his era.

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James Fisk a.k.a. "Big Jim", was an american stockbroker and corporate executive. He also became friends with President Ulysses S. Grant.  He went in control over the  Railroad with Jay Gould. Someone named Stokes confronted Fisk at a Grand Hotel and killed Fisk out of Frustration.

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John D. Rockefeller is a businessman in the oil industry in the U.S. He built his first oil refinery near Cleveland 1870 called the Standard Oil Company. He bought out his suppliers and competitors to be the most dominant in the oil business. Because of this, the government created the Sherman Act to prevent this from happening.

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Scottish-American industrialist who owned the biggest steel production company. He led the expansion of the steel industry making him one of the most richest humans alive on Earth. He is the second most richest person ever, with a net worth of 310 billion. Before the government created all kinds of laws for businesses, Carnegie had also bought out his suppliers and competitors like many others.