Warren Buffet , the world's second richest man, announced over the weekend that he will soon donate 85% of his entire net worth, weighing in at around $37 Billion, to charities, with over 80% of it going to the Bill and Melinda Gates Foundation. This makes it the single largest monetary donation in history.

This news was indeed stunning. Buffett, 75, has for decades said his wealth would go to philanthropy but has just as steadily indicated the handoff would be made at his death. Now he was revising the timetable.

"I know what I want to do," he said, "and it makes sense to get going." On that spring day his plan was uncertain in some of its details; today it is essentially complete. And it is typical Buffett: rational, original, breaking the mold of how extremely rich people donate money.

Buffett has pledged to gradually give 85% of his Berkshire stock to five foundations. A dominant five-sixths of the shares will go to the world's largest philanthropic organization, the $30 billion Bill & Melinda Gates Foundation, whose principals are close friends of Buffett's (a connection that began in 1991, when a mutual friend introduced Buffett and Bill Gates).