The largest American charitable contributions of the year.

Correction, Feb. 11, 2008: Because of a reporting error, the 2007 Slate 60 did not originally include New York Mayor Michael Bloomberg. Bloomberg made donations totaling $205 million to 1,100 different organizations this year, which is good for eighth on the list. The total takes into account Bloomberg's personal giving, his shares of his company's giving, and his foundation's giving. This is hisfifth appearance on the Slate 60. Correction, Feb. 13, 2008: T. Denny Sanford's donation should have been reported as $474.6 million, not $431 million. Subsequently, Sanford's office has informed us of another 2007 contribution to his foundation that brings his total to $502.6 milion. This makes him No. 4 on the list. (Return to the corrected sentence.) Correction, Feb. 19, 2008: Because of a reporting error, the original list failed to include Microsoft co-founder Paul Allen. He gave $46 million to various groups this year, including the Paul G. Allen Family Foundation and the Experience Music Project. He's No. 49 on the list.  

Special thanks to the research department at the Center on Philanthropy at Indiana University. Additional research by Slate editorial assistant Chris Wilson and Slate interns Alex Joseph and Jonathan Rubin.