Charles Feeney, Who Made a Fortune and Then Gave It Away, Dies at 92. After piling up billions in business, he pledged to donate almost all of his money to causes before he died. He succeeded, and then lived a more modest life.
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Lifetime Giving: $46.1 billion. Buffett is likely the biggest philanthropist of all time thanks to his quest to give away more than 99% of his fortune.