World’s Greatest Philanthropists. Meet The Super Rich And Generous.

13. Mark Zuckerberg

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Mark Zuckerberg is one of the youngest self-made billionaires in the world. The Facebook founder signed the Giving Pledge. He promised to share at least half of his wealth in his lifetime. He has already donated $1.6 billion. Last year, Zuckerberg and his wife Priscilla disbursed $25 million to help fight Ebola.