Posted on Forbes.
The ranking of the 50 biggest givers is based solely on money given out, not pledged, in calendar year 2012. It’s easy for the wealthy to make a commitment and issue a press release. These people actually put the most money to work for good. Over the past year, the Gateses have donated $2 billion toward philanthropic work. Bill and Melinda Gates lead the pack of top givers with lifetime donations totaling $28 billion.