Heinrich Brüning
During the last years of his life, Gibson was director of the Intergovernmental Committee for European Migration in Geneva. The organization, mandated to help European governments to identify resettlement countries for the estimated 11 million people uprooted by the war, arranged transport for nearly 1 million migrants during the 1950s. After Gibson's death, former German Chancellor Heinrich Brüning (1930–1932) declared, "He was... one of the greatest diplomatists the USA has had in two generations, but he was too modest for getting publicity for his views."