The war, when it came, only lasted for a month, but that was long enough. All life was quickly extinguished in the northern hemisphere, and the clouds of deadly radioactive fallout gradually diffused to shroud the whole globe. For the people of Australia, it was a lingering, drawn out journey to oblivion. Nevil Shute’s apocalyptic novel On the Beach was published the same year as the first Australia Unlimited supplement. Its theme was not confidence, but fear, resignation and confusion. There was a new threat from the north, invisible and unstoppable. ‘It’s going to go on spreading down here, southwards, till it gets to us?’, Moira asks, ‘And they can’t do anything about it?’ ‘Not a thing’, replies Commander Dwight Towers, ‘It’s just too big a matter for mankind to tackle. We’ve just got to take it’.^[76] All they can do is wait helplessly for their own death. In this final act of surrender the people of Australia are united with the rest of humanity: one world or none.

Just as atomic power promised to conquer Australia’s vast spaces, so the bomb seemed poised to obliterate national boundaries. There would be no winners in an atomic war. G. V. Portus from the University of Adelaide argued that the ‘only defence of the world against the threat of atomic warfare is political defence’, and called for the ‘abandonment’ of the ‘out-of-date’ concept of national sovereignty.^[77] Some looked with hope to the newly formed United Nations and its attempts to negotiate a system of control, but the UN Atomic Energy Commission soon descended into deadlock.^[78] Others sought more radical solutions, inspired by Einstein and his declaration in favour of world government.^[79] But the political fallout from our atom-bombed world soon settled, and the divisions became clear again. In this new age of oxymorons, war was cold, and the bomb was a weapon of peace.

The Cold War pushed Australia’s defensive frontiers ever northward, as the concept of ‘forward defence’ emerged to contain the threat of communism.^[80] ‘We must, by peaceful means extend the frontiers of the human spirit’, Menzies proclaimed, ‘We must, by armed strength, defend the geographical frontiers of those nations whose self-government is based upon the freedom of the spirit’.^[81] Menzies invoked the prospect of a looming third world war to justify his government’s defence preparation program, but increasingly Australia sought security in treaties and alliances, rather than men and guns.^[82] The nation’s defence was to be assured through the graces of its powerful friends, rather than the character of its citizen soldiery. Just like the characters in On the Beach, Australians were left to ponder a threat that they barely understood, and against which they could do very little.

But even as the frontiers of Australian security expanded, so they rebounded inwards, enclosing hearts and minds in an ever tighter grip. Long-held fears of infiltration were revived, with communism identified as a domestic as well as an international threat. Agents of the enemy were amongst us. The circumstances of the bomb’s creation and use focused much of this anxiety on the myth of the ‘atomic secret’.^[83] The CSIR, with its modest atomic energy program, proved a favourite target for political opportunists.^[84] Not only was it believed to be harbouring communists, its Chairman, David Rivett, had the temerity to suggest that good science entailed the free and open interchange of information.^[85] To prove their security credentials at home and abroad, both Labor and Liberal governments cranked up the legislative apparatus, providing new levels of protection for defence ‘secrets’, and creating new agencies to monitor the threat within.^[86] The common citizen was no longer the nation’s guarantee of security, but a potential weak link in its defensive perimeter.

It was, perhaps, human weakness that was most glaringly exposed by the bomb blast over Hiroshima. Even as the world marvelled at this new conquest of the forces of nature, they wondered if humanity had the maturity and wisdom to control it. ‘It is a challenge to the conscience of man’, the Argus considered, ‘to ponder gravely whether his intellectual achievements have not outrun his moral perceptions’.^[87] The ‘crossroads of destiny’ had brought a ‘moral test’ upon the world; science demanded ‘a change of heart’.^[88] And there was no time to get your breath back. Bomb tests followed bomb tests, and then the Russians had it, and so the Americans built the H-bomb, and there were more tests … The frontiers of science were running ahead, pushing ever deeper into unknown territory, leaving the world gasping, trying to catch up. In April 1954 a distinguished panel of speakers considered the latest menace under the title ‘The H-Bomb – A Challenge to Humanity’. Canon E. J. Davidson proclaimed: ‘Our civilisation stands at the point of decision … It must conform to the moral order of the universe or perish’.^[89]

Each new challenge brought its own sense of urgency, its own restatement of the crossroads choice – change or die. There was no ‘turning point’, no critical juncture on the road to progress, only constant reminders of our own fallibility and the apparent disconnection of science from the ethical life of humanity. The crossroads offered not the chance to change the future, but to conform to it. We were the ‘other’, able to occupy the future only through the courtesy of science. The destructive sense of inevitability that the frontier wreaked upon the land and its original inhabitants was turned upon us all. It was humanity itself that threatened progress.