In the 1950s and 1960s, changes in the international situation, such as decolonization in Asia, led some Australians to question the usefulness of keeping the ‘White Australia Policy’, the basis for the country’s immigration system since Federation in 1901. Some argued that Australia’s international reputation, especially with newly independent countries in Asia and Africa, could be harmed by the maintenance of this policy. Events such as the Sharpeville Massacre in apartheid South Africa in 1960 caused further introspection into Australia’s racialized system. However, as pushes to reform the policy grew, others used international events to resist reforms. Using speeches by politicians and documents produced by policymakers, this article will show how events, such as the Notting Hill riots in Britain, the Little Rock controversy in the United States, and the Sharpeville massacre, were used as warnings about Australia potentially introducing similar ‘racial problems’ if it allowed more non-white migration. This article argues that these concerns tapped into a transnational whiteness that shared anxieties about decolonization, civil rights and non-white immigration in the post-war period, bringing a racialized solidarity forged at the turn of the twentieth century into the Cold War era.