Jay Gould became hugely rich without ever really making a product or offering a service to benefit his customers. Other "Robber Barons" in the 19th century forged steel or pumped oil to make money - but Gould preferred to manipulate the stock market or bribe judges and politicians to generate a profit. 

Even when he was fired from the railway company he mismanaged, he used this inside information to profit from the soaring share price. No one liked Jay Gould - indeed many people physically assaulted him because of his awful behaviour - but his real legacy was the raft of laws America passed to try to prevent such a businessman ever rising to power again.   

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