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Due to unforeseen circumstances, NSPR will no longer be able to broadcast Hearts of Space.

The racial history of the 'overpopulation time bomb' and 'pronatalism' movements

NPR | By Gene Demby,

Michel Martin

Published October 28, 2025 at 2:00 AM PDT

Code Switch explores the racial history of two seemingly opposing movements that inform today's declining birthrates.

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Gene Demby

Gene Demby is the co-host and correspondent for NPR's Code Switch team.

Michel Martin

Michel Martin is a host of Morning Edition.