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Many global population projections point to the current world population of roughly seven billion people peaking at around nine to ten billion in 2050, after which numbers will slowly decline. In the midst of this growth, Australia’s current population of 23 million is predicted to rise to around 30 or 35 million in the same period. This low growth outlook has been called ‘big Australia.’ We are kidding ourselves, aren’t we?

‘Populate or perish’ was a rallying cry of post-World War II Labor Immigration Minister Arthur Calwell as he sought to overcome domestic resistance to immigration. For Calwell, immigration was the key to quickly boosting Australia’s population numbers in the interests of economic and military security. An avowed supporter of the...