Both Carnegie and Rockefeller had a sense of effective philanthropy. I find it very impressive that Carnegie managed to spend 90% of his assets before he died.
http://en.wikipedia.org/wiki/Howard_Hughes_Medical_Institute
It has a $17 billion endowment.
Actually, there are other large endowments if you look on the list.
http://en.m.wikipedia.org/wiki/List_of_wealthiest_foundation...
Both Carnegie and Rockefeller had a sense of effective philanthropy. I find it very impressive that Carnegie managed to spend 90% of his assets before he died.