Philanthropist David Rockefeller marked his 90th birthday this year with two mega gifts: He pledged $100 million to the Museum of Modern Art and $100 million to Rockefeller University. He'll provide both institutions with $5 million a year until his death, when they will receive the gifts. Rockefeller discusses his familly's philanthropic tradition and how he hopes to use his own gifts to encourage other philanthropists to give more
