[Picture: Rockefeller in 1904]
The Rockefeller Foundation built the Peking Union Medical College into a great institution, helped in World War I war relief, and it employed William Lyon Mackenzie King of Canada to study industrial relations. Rockefeller's fourth main philanthropy, the Laura Spelman Rockefeller Memorial Foundation, created in 1918, supported work in the social studies; it was later absorbed into the Rockefeller Foundation. However, all told, Rockefeller gave away about $550 million.
Oddly enough, Rockefeller was probably best known in his later life for the practice of giving dimes to children wherever he went. He even gave dimes as a playful gesture to men like tire mogul Harvey Firestone and President Hoover. During the Great Depression, Rockefeller switched to giving nickels instead of dimes.