Ashley and Nick Evancho say raising their young daughter, Sophia, is one of the most joyous things they've ever done. But the Evanchos also made a decision that's increasingly common for families in the U.S. and around the world: one is enough. The trend is leading to populations that are dramatically older, and beginning to shrink, in many of the world's biggest economies.

Experts say a rapidly aging and gradually shrinking population in the world's wealthiest countries could force sweeping changes in people's lives, causing many to work longer before retirement, making it harder for business owners to find employees and destabilizing eldercare and health insurance programs.

This story is part of NPR's Population Shift series.

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This episode was produced by Paige Waterhouse and Connor Donevan, with audio engineering by Jimmy Keeley. It was edited by Andrea de Leon and Courtney Dorning. Our executive producer is Sami Yenigun.

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Can the global economy handle a world with fewer kids?

Consider This from NPR

Can the global economy handle a world with fewer kids?