Maternal Dispatches with Hollie McKay

Maternal Dispatches with Hollie McKay

The Great Inversion: How a Global Fertility Collapse Is Rewriting the Future of Nations

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Hollie McKay
Mar 16, 2026
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Our planet has entered what demographers are calling a “Great Inversion,” a profound reversal of the long-standing demographic momentum that powered global population growth for millennia.

More than half of all countries now report fertility rates below the roughly 2.1 children per woman needed to maintain a stable population in the absence of significant immigration. For modern economies built on the assumption of ever-expanding labor forces and steady youth replenishment, this quiet shift threatens to upend the foundations of social and financial systems.

But what does this all actually mean in reality?

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