True story: Bill Gates got interested in solving the malaria problem. He threw so much money at the problem the legit researchers had to tell him to stop.
And to his credit, he did stop. See, philanthropy is the last pleasure, the one the rich turn to in every age. The great weakness of untutored philanthropy is this: it only solves a single problem, often at the expense of others.
But Gates, for all his bumptious mistakes, is trying his best to understand the Larger Problems. He and Warren Buffett, having seen the problems philanthropy can create, are intent upon learning from the mistakes of others - and their own.