Not content with having devoted his career to amassing the biggest fortune in history, Bill Gates has said that he wants to devote the rest of his life to giving it away. Microsoft's chief software architect is not alone. Sandy Weill, recently retired from Citigroup, has committed himself to a deal he "made with God" over his modest $1.4 billion stash. That the moneyed are munificent is welcome, but that the best brains in business take the giving seriously matters, too. Philanthropy, done well, is a serious undertaking. Too often, the money is frittered away.
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