Rockefeller created the Rockefeller Foundation in 1913[127] to continue and expand the scope of the work of the Sanitary Commission,[122] which was closed in 1915.[128] He gave $182 million to the foundation,[115] which focused on public health, medical training, and the arts. It endowed Johns Hopkins School of Hygiene and Public Health,[122] the first of its kind.[129] It also built the Peking Union Medical College in China into a notable institution.[118] The foundation helped in World War I war relief,[130] and it employed William Lyon Mackenzie King of Canada to study industrial relations.[131]
In the 1920s, the Rockefeller Foundation funded a hookworm eradication campaign through the International Health Division. This campaign used a combination of politics and science, along with collaboration between healthcare workers and government officials to accomplish its goals.[132]
Rockefeller's fourth main philanthropy, the Laura Spelman Rockefeller Memorial Foundation, was created in 1918.[133] Through this, he supported work in the social studies; this was later absorbed into the Rockefeller Foundation. In total Rockefeller donated about $530 million.[134]