Nikola Tesla, the man who made alternating current work, wrote to J. Pierpont Morgan, the industrialist and banker. It was 1902 and Tesla was broke. ‘Am I backed by the greatest financier of all time? And shall I lose great triumphs and an immense fortune because I need a sum of money? Are you going to leave me in a hole?!! Financially, I am in a dreadful fix.’

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