'Who would have guessed that a rejuvenation of regional difference might be triggered by a plague? Cosmopolitan Melbourne became the epicentre of what Prime Minister Scott Morrison has called the ‘Victorian wave’. Borders, the leitmotif of Australian politics since Tampa, suddenly became internal. My own state of Western Australia was sued for breach of the Australian Constitution for maintaining its ‘hard’ internal borders. Wonted barbs flowing between states now felt just a little personal. Interstate rivalry in Australia is not uncommon, with familiar stoushes over GST share, the Murray– Darling Basin, the location of naval shipbuilding, and the hosting of sporting events. But the idea that Australia has internal borders, not just to check fruit but to stop the movement of people, Australian people, is something that has only emerged with Covid-19.' (Introduction)