This chapter assesses the contributions of British UN staff to the organization's innovative global social governance initiatives between 1945 and 1970. The transnational governance of welfare, health, education, and other social issues of traditional domestic jurisdiction was a revolutionary element of postwar international governance. Colonial and imperial service in Africa and India, as well as Home Civil Service experiences, led many other Britons into UN agencies that worked in global social governance fields. These included child welfare, agricultural and educational aid, humanitarian aid, migrant and refugee relief, and freedom of expression. The British government’s Overseas Service Aid Scheme subsidized former colonial staff who wished to stay on in positions with new postcolonial state governments. This chapter evaluates the personal histories and contributions to global social governance of Britons who worked in postwar UN global social governance organizations and demonstrates how this work both contributed to postcolonial state-building and continued long-standing racial divisions.