No. 2: Mark Zuckerberg and Priscilla Chan; No. 3: John and Laura Arnold; and No. 5, Sergy Brin and Anne Wojcicki

Among the five top philanthropists last year, three were couples under 40.

But even with $1.1-billion in new gifts from young billionaires, megaphilanthropy last year remained below levels seen before 2007's economic shock.

A stack of state puzzle pieces with Utah on top

Special Report

How America Gives

An exclusive Chronicle study shows how neighborhoods, cities, and states rank in generosity. How does your community compare?


America's giving divide
Regional differences in giving are stark

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