In the village of Dikaia, Greece, March 2024
Louisa Gouliamaki / Reuters

Although few yet see it coming, humans are about to enter a new era of history. Call it “the age of depopulation.” For the first time since the Black Death in the 1300s, the planetary population will decline. But whereas the last implosion was caused by a deadly disease borne by fleas, the coming one will be entirely due to choices made by people.

With birthrates plummeting, more and more societies are heading into an era of pervasive and indefinite depopulation, one that will eventually encompass the whole planet. What lies ahead is a world made up of shrinking and

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