David Rockefeller has given the Museum of Modern Art $100 million for its endowment. “Mr. Rockefeller said the gift was intended to shore up public programs at the Modern, which just completed an ambitious $858 million expansion that more than doubled its size. Mr. Rockefeller, who is 89, said the museum would receive the money after his death. In the meantime, he said, he would give the Modern $5 million a year as if the money were already invested in the endowment.”