In the late 1940s, the Labour government faced a birthrate perceived to be in decline, massive economic dislocations caused by the war, a huge national debt, severe labor shortages, and the prospective loss of international preeminence. Simultaneously, it subsidized the emigration of Britons to Australia, Canada, and other parts of the Empire, recruited Irish citizens and European refugees to work in Britain, and used regulatory changes to dissuade British subjects of color from coming to the United Kingdom. Paul contends post-war concepts of citizenship were based on a contradiction between the formal definition of who had the right to enter Britain and the informal notion of who was, or could become, really British.