All wars are avoidable, not just the war in Ukraine, but a future war with China too. Most of Australia’s wars have been unnecessary, as historian Henry Reynolds has shown. A war with China would be both: avoidable and unnecessary. It would be more catastrophic for Australia than any we have fought. Yet our former Defence Minister found it inconceivable that if the US goes to war over Taiwan, Australia will not be involved. Peter Dutton advised us if we want peace, to prepare for war. Preparing for peace would seem a more rational choice for any Australian government. Australia...