http://www.businessweek.com/pdfs/2005/0548_philsco.pdf [Broken] The top ten: 1. Gordon and Betty Moore 2. Bill and Melinda Gates 3. Warren Buffett 4. George Soros 5. Eli and Edythe Broad 6. James and Virginia Stowers 7. The Walton Family 8. Alfred Mann 9. Michael and Susan Dell 10. George Kaiser These numbers are over the last five years. In terms of lifetime giving, no one even comes close to Bill and Melinda Gates, who have given nearly $28 billion, mostly to fund health, education, and libraries according to this document. The most impressive philanthropist on the list, however, might be Veronica Atkins, who has given a ridiculous 1000% of her current net worth to fighting obesity and diabetes. Another notable is NYC mayor Michael Bloomberg, who comes in at #13 on the list, setting a good example for the people of his city.