She was involved in the charity relief campaign for the victims of the 1931 China floods, writing a series of short stories describing the plight of refugees, which were broadcast on the radio in the United States and later published in her collected volume "The First Wife and Other Stories". In 1949, outraged that existing adoption services considered Asian and mixed-race children unadoptable, Buck co-founded Welcome House, Inc., the first international, interracial adoption agency, along with James A. Michener, Oscar Hammerstein II and his second wife Dorothy Hammerstein. In nearly five decades of work, Welcome House has placed over five thousand children. In 1964, to support children who were not eligible for adoption, Buck established the Pearl S. Buck Foundation (name changed to Pearl S. Buck International in 1999) to "address poverty and discrimination faced by children in Asian countries." In 1964, she opened the Opportunity Center and Orphanage in South Korea, and later offices were opened in Thailand, the Philippines, and Vietnam. When establishing Opportunity House, Buck said, "The purpose ... is to publicize and eliminate injustices and prejudices suffered by children, who, because of their birth, are not permitted to enjoy the educational, social, economic and civil privileges normally accorded to children."